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Finding the Fourth Proportional to 724,684.80, 999,840.76 and 418,649.52

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Solution

The fourth proportional to 724,684.80, 999,840.76 and 418,649.52 is: 577,606.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,684.80 : 999,840.76 = 418,649.52 : x
  2. Step 2: Convert to fraction form
    724,684.80/999,840.76 = 418,649.52/x
  3. Step 3: Cross multiply
    724,684.80x = 999,840.76 × 418,649.52
  4. Step 4: Simplify right side
    724,684.80x = 418,582,854,250.44
  5. Step 5: Solve for x
    x = 418,582,854,250.44/724,684.80
  6. Step 6: Final answer
    x = 577,606.78

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.