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Finding the Fourth Proportional to 539,097.90, 808,646.85 and 478,445.10

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Solution

The fourth proportional to 539,097.90, 808,646.85 and 478,445.10 is: 717,667.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,097.90 : 808,646.85 = 478,445.10 : x
  2. Step 2: Convert to fraction form
    539,097.90/808,646.85 = 478,445.10/x
  3. Step 3: Cross multiply
    539,097.90x = 808,646.85 × 478,445.10
  4. Step 4: Simplify right side
    539,097.90x = 386,893,123,012.94
  5. Step 5: Solve for x
    x = 386,893,123,012.94/539,097.90
  6. Step 6: Final answer
    x = 717,667.65

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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.