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Finding the Fourth Proportional to 747.14, 1,121.33 and 400.72

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Solution

The fourth proportional to 747.14, 1,121.33 and 400.72 is: 601.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.14 : 1,121.33 = 400.72 : x
  2. Step 2: Convert to fraction form
    747.14/1,121.33 = 400.72/x
  3. Step 3: Cross multiply
    747.14x = 1,121.33 × 400.72
  4. Step 4: Simplify right side
    747.14x = 449,339.36
  5. Step 5: Solve for x
    x = 449,339.36/747.14
  6. Step 6: Final answer
    x = 601.41

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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.