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Finding the Fourth Proportional to 731.46, 1,009.37 and 416.72

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Solution

The fourth proportional to 731.46, 1,009.37 and 416.72 is: 575.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.46 : 1,009.37 = 416.72 : x
  2. Step 2: Convert to fraction form
    731.46/1,009.37 = 416.72/x
  3. Step 3: Cross multiply
    731.46x = 1,009.37 × 416.72
  4. Step 4: Simplify right side
    731.46x = 420,621.38
  5. Step 5: Solve for x
    x = 420,621.38/731.46
  6. Step 6: Final answer
    x = 575.04

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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.