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Finding the Fourth Proportional to 674.62, 931.01 and 425.91

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Solution

The fourth proportional to 674.62, 931.01 and 425.91 is: 587.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.62 : 931.01 = 425.91 : x
  2. Step 2: Convert to fraction form
    674.62/931.01 = 425.91/x
  3. Step 3: Cross multiply
    674.62x = 931.01 × 425.91
  4. Step 4: Simplify right side
    674.62x = 396,526.47
  5. Step 5: Solve for x
    x = 396,526.47/674.62
  6. Step 6: Final answer
    x = 587.78

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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.