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Finding the Fourth Proportional to 399,064.20, 598,596.30 and 392,503.20

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Solution

The fourth proportional to 399,064.20, 598,596.30 and 392,503.20 is: 588,754.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,064.20 : 598,596.30 = 392,503.20 : x
  2. Step 2: Convert to fraction form
    399,064.20/598,596.30 = 392,503.20/x
  3. Step 3: Cross multiply
    399,064.20x = 598,596.30 × 392,503.20
  4. Step 4: Simplify right side
    399,064.20x = 234,950,963,258.16
  5. Step 5: Solve for x
    x = 234,950,963,258.16/399,064.20
  6. Step 6: Final answer
    x = 588,754.80

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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.