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Finding the Fourth Proportional to 757.48, 1,045.19 and 425.92

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Solution

The fourth proportional to 757.48, 1,045.19 and 425.92 is: 587.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.48 : 1,045.19 = 425.92 : x
  2. Step 2: Convert to fraction form
    757.48/1,045.19 = 425.92/x
  3. Step 3: Cross multiply
    757.48x = 1,045.19 × 425.92
  4. Step 4: Simplify right side
    757.48x = 445,167.32
  5. Step 5: Solve for x
    x = 445,167.32/757.48
  6. Step 6: Final answer
    x = 587.70

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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.