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Finding the Fourth Proportional to 748.14, 1,032.25 and 428.96

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Solution

The fourth proportional to 748.14, 1,032.25 and 428.96 is: 591.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.14 : 1,032.25 = 428.96 : x
  2. Step 2: Convert to fraction form
    748.14/1,032.25 = 428.96/x
  3. Step 3: Cross multiply
    748.14x = 1,032.25 × 428.96
  4. Step 4: Simplify right side
    748.14x = 442,792.82
  5. Step 5: Solve for x
    x = 442,792.82/748.14
  6. Step 6: Final answer
    x = 591.86

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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.