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Finding the Fourth Proportional to 716,468.74, 988,726.82 and 394,171.92

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Solution

The fourth proportional to 716,468.74, 988,726.82 and 394,171.92 is: 543,957.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,468.74 : 988,726.82 = 394,171.92 : x
  2. Step 2: Convert to fraction form
    716,468.74/988,726.82 = 394,171.92/x
  3. Step 3: Cross multiply
    716,468.74x = 988,726.82 × 394,171.92
  4. Step 4: Simplify right side
    716,468.74x = 389,728,347,024.04
  5. Step 5: Solve for x
    x = 389,728,347,024.04/716,468.74
  6. Step 6: Final answer
    x = 543,957.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.