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Finding the Fourth Proportional to 762.18, 1,141.45 and 723.91

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Solution

The fourth proportional to 762.18, 1,141.45 and 723.91 is: 1,084.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.18 : 1,141.45 = 723.91 : x
  2. Step 2: Convert to fraction form
    762.18/1,141.45 = 723.91/x
  3. Step 3: Cross multiply
    762.18x = 1,141.45 × 723.91
  4. Step 4: Simplify right side
    762.18x = 826,302.41
  5. Step 5: Solve for x
    x = 826,302.41/762.18
  6. Step 6: Final answer
    x = 1,084.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.