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Finding the Fourth Proportional to 540,735,786.90, 811,103,680.35 and 358,982,964.90

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Solution

The fourth proportional to 540,735,786.90, 811,103,680.35 and 358,982,964.90 is: 538,474,447.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,735,786.90 : 811,103,680.35 = 358,982,964.90 : x
  2. Step 2: Convert to fraction form
    540,735,786.90/811,103,680.35 = 358,982,964.90/x
  3. Step 3: Cross multiply
    540,735,786.90x = 811,103,680.35 × 358,982,964.90
  4. Step 4: Simplify right side
    540,735,786.90x = 291,172,404,013,344,832
  5. Step 5: Solve for x
    x = 291,172,404,013,344,832/540,735,786.90
  6. Step 6: Final answer
    x = 538,474,447.35

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Half scale
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Double scale
Find fourth proportional to 540,735,787.90, 811,103,681.85 and 358,982,965.90
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.