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Finding the Fourth Proportional to 658,887.60, 988,331.40 and 389,449.20

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Solution

The fourth proportional to 658,887.60, 988,331.40 and 389,449.20 is: 584,173.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,887.60 : 988,331.40 = 389,449.20 : x
  2. Step 2: Convert to fraction form
    658,887.60/988,331.40 = 389,449.20/x
  3. Step 3: Cross multiply
    658,887.60x = 988,331.40 × 389,449.20
  4. Step 4: Simplify right side
    658,887.60x = 384,904,873,064.88
  5. Step 5: Solve for x
    x = 384,904,873,064.88/658,887.60
  6. Step 6: Final answer
    x = 584,173.80

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Similar ratio
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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.