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Finding the Fourth Proportional to 731.12, 1,008.95 and 416.37

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Solution

The fourth proportional to 731.12, 1,008.95 and 416.37 is: 574.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.12 : 1,008.95 = 416.37 : x
  2. Step 2: Convert to fraction form
    731.12/1,008.95 = 416.37/x
  3. Step 3: Cross multiply
    731.12x = 1,008.95 × 416.37
  4. Step 4: Simplify right side
    731.12x = 420,099.03
  5. Step 5: Solve for x
    x = 420,099.03/731.12
  6. Step 6: Final answer
    x = 574.59

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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.