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Finding the Fourth Proportional to 757.48, 1,045.30 and 425.90

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Solution

The fourth proportional to 757.48, 1,045.30 and 425.90 is: 587.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.48 : 1,045.30 = 425.90 : x
  2. Step 2: Convert to fraction form
    757.48/1,045.30 = 425.90/x
  3. Step 3: Cross multiply
    757.48x = 1,045.30 × 425.90
  4. Step 4: Simplify right side
    757.48x = 445,196.42
  5. Step 5: Solve for x
    x = 445,196.42/757.48
  6. Step 6: Final answer
    x = 587.74

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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.