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Finding the Fourth Proportional to 757.43, 1,045.35 and 425.87

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Solution

The fourth proportional to 757.43, 1,045.35 and 425.87 is: 587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.43 : 1,045.35 = 425.87 : x
  2. Step 2: Convert to fraction form
    757.43/1,045.35 = 425.87/x
  3. Step 3: Cross multiply
    757.43x = 1,045.35 × 425.87
  4. Step 4: Simplify right side
    757.43x = 445,183.20
  5. Step 5: Solve for x
    x = 445,183.20/757.43
  6. Step 6: Final answer
    x = 587.75

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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.