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Finding the Fourth Proportional to 757.31, 1,045.08 and 425.81

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Solution

The fourth proportional to 757.31, 1,045.08 and 425.81 is: 587.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.31 : 1,045.08 = 425.81 : x
  2. Step 2: Convert to fraction form
    757.31/1,045.08 = 425.81/x
  3. Step 3: Cross multiply
    757.31x = 1,045.08 × 425.81
  4. Step 4: Simplify right side
    757.31x = 445,000.29
  5. Step 5: Solve for x
    x = 445,000.29/757.31
  6. Step 6: Final answer
    x = 587.61

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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.