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Finding the Fourth Proportional to 748.17, 1,122.53 and 383.13

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Solution

The fourth proportional to 748.17, 1,122.53 and 383.13 is: 574.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.17 : 1,122.53 = 383.13 : x
  2. Step 2: Convert to fraction form
    748.17/1,122.53 = 383.13/x
  3. Step 3: Cross multiply
    748.17x = 1,122.53 × 383.13
  4. Step 4: Simplify right side
    748.17x = 430,073.00
  5. Step 5: Solve for x
    x = 430,073.00/748.17
  6. Step 6: Final answer
    x = 574.83

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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.