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Finding the Fourth Proportional to 691.28, 950.69 and 549.73

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Solution

The fourth proportional to 691.28, 950.69 and 549.73 is: 756.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.28 : 950.69 = 549.73 : x
  2. Step 2: Convert to fraction form
    691.28/950.69 = 549.73/x
  3. Step 3: Cross multiply
    691.28x = 950.69 × 549.73
  4. Step 4: Simplify right side
    691.28x = 522,620.44
  5. Step 5: Solve for x
    x = 522,620.44/691.28
  6. Step 6: Final answer
    x = 756.02

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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.