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Finding the Fourth Proportional to 604,915.20, 907,372.80 and 392,338.80

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Solution

The fourth proportional to 604,915.20, 907,372.80 and 392,338.80 is: 588,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,915.20 : 907,372.80 = 392,338.80 : x
  2. Step 2: Convert to fraction form
    604,915.20/907,372.80 = 392,338.80/x
  3. Step 3: Cross multiply
    604,915.20x = 907,372.80 × 392,338.80
  4. Step 4: Simplify right side
    604,915.20x = 355,997,555,504.64
  5. Step 5: Solve for x
    x = 355,997,555,504.64/604,915.20
  6. Step 6: Final answer
    x = 588,508.20

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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.