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Finding the Fourth Proportional to 732.21, 1,010.40 and 400.57

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Solution

The fourth proportional to 732.21, 1,010.40 and 400.57 is: 552.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.21 : 1,010.40 = 400.57 : x
  2. Step 2: Convert to fraction form
    732.21/1,010.40 = 400.57/x
  3. Step 3: Cross multiply
    732.21x = 1,010.40 × 400.57
  4. Step 4: Simplify right side
    732.21x = 404,735.93
  5. Step 5: Solve for x
    x = 404,735.93/732.21
  6. Step 6: Final answer
    x = 552.76

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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.