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Finding the Fourth Proportional to 754.89, 1,132.88 and 425.49

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Solution

The fourth proportional to 754.89, 1,132.88 and 425.49 is: 638.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.89 : 1,132.88 = 425.49 : x
  2. Step 2: Convert to fraction form
    754.89/1,132.88 = 425.49/x
  3. Step 3: Cross multiply
    754.89x = 1,132.88 × 425.49
  4. Step 4: Simplify right side
    754.89x = 482,026.98
  5. Step 5: Solve for x
    x = 482,026.98/754.89
  6. Step 6: Final answer
    x = 638.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.