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Finding the Fourth Proportional to 513,841.20, 770,761.80 and 478,849.20

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Solution

The fourth proportional to 513,841.20, 770,761.80 and 478,849.20 is: 718,273.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,841.20 : 770,761.80 = 478,849.20 : x
  2. Step 2: Convert to fraction form
    513,841.20/770,761.80 = 478,849.20/x
  3. Step 3: Cross multiply
    513,841.20x = 770,761.80 × 478,849.20
  4. Step 4: Simplify right side
    513,841.20x = 369,078,671,320.56
  5. Step 5: Solve for x
    x = 369,078,671,320.56/513,841.20
  6. Step 6: Final answer
    x = 718,273.80

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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.