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Finding the Fourth Proportional to 478,809.20, 718,213.80 and 146,385.20

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Solution

The fourth proportional to 478,809.20, 718,213.80 and 146,385.20 is: 219,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,809.20 : 718,213.80 = 146,385.20 : x
  2. Step 2: Convert to fraction form
    478,809.20/718,213.80 = 146,385.20/x
  3. Step 3: Cross multiply
    478,809.20x = 718,213.80 × 146,385.20
  4. Step 4: Simplify right side
    478,809.20x = 105,135,870,755.76
  5. Step 5: Solve for x
    x = 105,135,870,755.76/478,809.20
  6. Step 6: Final answer
    x = 219,577.80

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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.