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Finding the Fourth Proportional to 747.36, 1,121.04 and 422.55

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Solution

The fourth proportional to 747.36, 1,121.04 and 422.55 is: 633.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.36 : 1,121.04 = 422.55 : x
  2. Step 2: Convert to fraction form
    747.36/1,121.04 = 422.55/x
  3. Step 3: Cross multiply
    747.36x = 1,121.04 × 422.55
  4. Step 4: Simplify right side
    747.36x = 473,695.45
  5. Step 5: Solve for x
    x = 473,695.45/747.36
  6. Step 6: Final answer
    x = 633.83

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