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Finding the Fourth Proportional to 708.71, 1,062.02 and 621.83

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Solution

The fourth proportional to 708.71, 1,062.02 and 621.83 is: 931.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.71 : 1,062.02 = 621.83 : x
  2. Step 2: Convert to fraction form
    708.71/1,062.02 = 621.83/x
  3. Step 3: Cross multiply
    708.71x = 1,062.02 × 621.83
  4. Step 4: Simplify right side
    708.71x = 660,387.48
  5. Step 5: Solve for x
    x = 660,387.48/708.71
  6. Step 6: Final answer
    x = 931.82

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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.