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Finding the Fourth Proportional to 747.19, 1,125.12 and 553.56

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Solution

The fourth proportional to 747.19, 1,125.12 and 553.56 is: 833.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.19 : 1,125.12 = 553.56 : x
  2. Step 2: Convert to fraction form
    747.19/1,125.12 = 553.56/x
  3. Step 3: Cross multiply
    747.19x = 1,125.12 × 553.56
  4. Step 4: Simplify right side
    747.19x = 622,821.43
  5. Step 5: Solve for x
    x = 622,821.43/747.19
  6. Step 6: Final answer
    x = 833.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.