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Finding the Fourth Proportional to 647,215.40, 970,823.10 and 363,780.20

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Solution

The fourth proportional to 647,215.40, 970,823.10 and 363,780.20 is: 545,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,215.40 : 970,823.10 = 363,780.20 : x
  2. Step 2: Convert to fraction form
    647,215.40/970,823.10 = 363,780.20/x
  3. Step 3: Cross multiply
    647,215.40x = 970,823.10 × 363,780.20
  4. Step 4: Simplify right side
    647,215.40x = 353,166,221,482.62
  5. Step 5: Solve for x
    x = 353,166,221,482.62/647,215.40
  6. Step 6: Final answer
    x = 545,670.30

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Double scale
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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.