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Finding the Fourth Proportional to 732.89, 1,011.31 and 418.05

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Solution

The fourth proportional to 732.89, 1,011.31 and 418.05 is: 576.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.89 : 1,011.31 = 418.05 : x
  2. Step 2: Convert to fraction form
    732.89/1,011.31 = 418.05/x
  3. Step 3: Cross multiply
    732.89x = 1,011.31 × 418.05
  4. Step 4: Simplify right side
    732.89x = 422,777.10
  5. Step 5: Solve for x
    x = 422,777.10/732.89
  6. Step 6: Final answer
    x = 576.86

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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.