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Finding the Fourth Proportional to 642,710.97, 962,710.20 and 515,663.37

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Solution

The fourth proportional to 642,710.97, 962,710.20 and 515,663.37 is: 772,406.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,710.97 : 962,710.20 = 515,663.37 : x
  2. Step 2: Convert to fraction form
    642,710.97/962,710.20 = 515,663.37/x
  3. Step 3: Cross multiply
    642,710.97x = 962,710.20 × 515,663.37
  4. Step 4: Simplify right side
    642,710.97x = 496,434,386,065.37
  5. Step 5: Solve for x
    x = 496,434,386,065.37/642,710.97
  6. Step 6: Final answer
    x = 772,406.90

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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.