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Finding the Fourth Proportional to 642,260.40, 962,224.20 and 392,650.80

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Solution

The fourth proportional to 642,260.40, 962,224.20 and 392,650.80 is: 588,263.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,260.40 : 962,224.20 = 392,650.80 : x
  2. Step 2: Convert to fraction form
    642,260.40/962,224.20 = 392,650.80/x
  3. Step 3: Cross multiply
    642,260.40x = 962,224.20 × 392,650.80
  4. Step 4: Simplify right side
    642,260.40x = 377,818,101,909.36
  5. Step 5: Solve for x
    x = 377,818,101,909.36/642,260.40
  6. Step 6: Final answer
    x = 588,263.11

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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.