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Finding the Fourth Proportional to 691.55, 1,036.12 and 576.73

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Solution

The fourth proportional to 691.55, 1,036.12 and 576.73 is: 864.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.55 : 1,036.12 = 576.73 : x
  2. Step 2: Convert to fraction form
    691.55/1,036.12 = 576.73/x
  3. Step 3: Cross multiply
    691.55x = 1,036.12 × 576.73
  4. Step 4: Simplify right side
    691.55x = 597,558.60
  5. Step 5: Solve for x
    x = 597,558.60/691.55
  6. Step 6: Final answer
    x = 864.09

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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.