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Finding the Fourth Proportional to 732.70, 1,011.16 and 401.15

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Solution

The fourth proportional to 732.70, 1,011.16 and 401.15 is: 553.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.70 : 1,011.16 = 401.15 : x
  2. Step 2: Convert to fraction form
    732.70/1,011.16 = 401.15/x
  3. Step 3: Cross multiply
    732.70x = 1,011.16 × 401.15
  4. Step 4: Simplify right side
    732.70x = 405,626.83
  5. Step 5: Solve for x
    x = 405,626.83/732.70
  6. Step 6: Final answer
    x = 553.61

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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.