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Finding the Fourth Proportional to 642,254.40, 962,215.20 and 392,644.80

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Solution

The fourth proportional to 642,254.40, 962,215.20 and 392,644.80 is: 588,254.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,254.40 : 962,215.20 = 392,644.80 : x
  2. Step 2: Convert to fraction form
    642,254.40/962,215.20 = 392,644.80/x
  3. Step 3: Cross multiply
    642,254.40x = 962,215.20 × 392,644.80
  4. Step 4: Simplify right side
    642,254.40x = 377,808,794,760.96
  5. Step 5: Solve for x
    x = 377,808,794,760.96/642,254.40
  6. Step 6: Final answer
    x = 588,254.12

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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.