Home / 811,103,680.10-1,216,655,520.15-538,474,447.10

Finding the Fourth Proportional to 811,103,680.10, 1,216,655,520.15 and 538,474,447.10

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Solution

The fourth proportional to 811,103,680.10, 1,216,655,520.15 and 538,474,447.10 is: 807,711,670.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,103,680.10 : 1,216,655,520.15 = 538,474,447.10 : x
  2. Step 2: Convert to fraction form
    811,103,680.10/1,216,655,520.15 = 538,474,447.10/x
  3. Step 3: Cross multiply
    811,103,680.10x = 1,216,655,520.15 × 538,474,447.10
  4. Step 4: Simplify right side
    811,103,680.10x = 655,137,908,523,934,208
  5. Step 5: Solve for x
    x = 655,137,908,523,934,208/811,103,680.10
  6. Step 6: Final answer
    x = 807,711,670.65

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Double scale
Find fourth proportional to 811,103,681.10, 1,216,655,521.65 and 538,474,448.10
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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.