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Finding the Fourth Proportional to 539,099.40, 808,649.10 and 478,446.60

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Solution

The fourth proportional to 539,099.40, 808,649.10 and 478,446.60 is: 717,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,099.40 : 808,649.10 = 478,446.60 : x
  2. Step 2: Convert to fraction form
    539,099.40/808,649.10 = 478,446.60/x
  3. Step 3: Cross multiply
    539,099.40x = 808,649.10 × 478,446.60
  4. Step 4: Simplify right side
    539,099.40x = 386,895,412,488.06
  5. Step 5: Solve for x
    x = 386,895,412,488.06/539,099.40
  6. Step 6: Final answer
    x = 717,669.90

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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.