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Finding the Fourth Proportional to 549.81, 824.57 and 159.72

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Solution

The fourth proportional to 549.81, 824.57 and 159.72 is: 239.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.81 : 824.57 = 159.72 : x
  2. Step 2: Convert to fraction form
    549.81/824.57 = 159.72/x
  3. Step 3: Cross multiply
    549.81x = 824.57 × 159.72
  4. Step 4: Simplify right side
    549.81x = 131,695.40
  5. Step 5: Solve for x
    x = 131,695.40/549.81
  6. Step 6: Final answer
    x = 239.53

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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.