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Finding the Fourth Proportional to 731.75, 1,009.80 and 400.17

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Solution

The fourth proportional to 731.75, 1,009.80 and 400.17 is: 552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.75 : 1,009.80 = 400.17 : x
  2. Step 2: Convert to fraction form
    731.75/1,009.80 = 400.17/x
  3. Step 3: Cross multiply
    731.75x = 1,009.80 × 400.17
  4. Step 4: Simplify right side
    731.75x = 404,091.67
  5. Step 5: Solve for x
    x = 404,091.67/731.75
  6. Step 6: Final answer
    x = 552.23

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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.