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Finding the Fourth Proportional to 642,713.47, 962,713.95 and 515,665.87

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Solution

The fourth proportional to 642,713.47, 962,713.95 and 515,665.87 is: 772,410.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,713.47 : 962,713.95 = 515,665.87 : x
  2. Step 2: Convert to fraction form
    642,713.47/962,713.95 = 515,665.87/x
  3. Step 3: Cross multiply
    642,713.47x = 962,713.95 × 515,665.87
  4. Step 4: Simplify right side
    642,713.47x = 496,438,726,587.89
  5. Step 5: Solve for x
    x = 496,438,726,587.89/642,713.47
  6. Step 6: Final answer
    x = 772,410.65

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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.