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Finding the Fourth Proportional to 731.37, 1,009.25 and 416.60

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Solution

The fourth proportional to 731.37, 1,009.25 and 416.60 is: 574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.37 : 1,009.25 = 416.60 : x
  2. Step 2: Convert to fraction form
    731.37/1,009.25 = 416.60/x
  3. Step 3: Cross multiply
    731.37x = 1,009.25 × 416.60
  4. Step 4: Simplify right side
    731.37x = 420,453.55
  5. Step 5: Solve for x
    x = 420,453.55/731.37
  6. Step 6: Final answer
    x = 574.88

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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.