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Finding the Fourth Proportional to 387,241.60, 580,862.40 and 356,915.20

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Solution

The fourth proportional to 387,241.60, 580,862.40 and 356,915.20 is: 535,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,241.60 : 580,862.40 = 356,915.20 : x
  2. Step 2: Convert to fraction form
    387,241.60/580,862.40 = 356,915.20/x
  3. Step 3: Cross multiply
    387,241.60x = 580,862.40 × 356,915.20
  4. Step 4: Simplify right side
    387,241.60x = 207,318,619,668.48
  5. Step 5: Solve for x
    x = 207,318,619,668.48/387,241.60
  6. Step 6: Final answer
    x = 535,372.80

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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.