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Finding the Fourth Proportional to 549.12, 757.56 and 339.15

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Solution

The fourth proportional to 549.12, 757.56 and 339.15 is: 467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.12 : 757.56 = 339.15 : x
  2. Step 2: Convert to fraction form
    549.12/757.56 = 339.15/x
  3. Step 3: Cross multiply
    549.12x = 757.56 × 339.15
  4. Step 4: Simplify right side
    549.12x = 256,926.47
  5. Step 5: Solve for x
    x = 256,926.47/549.12
  6. Step 6: Final answer
    x = 467.89

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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.