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Finding the Fourth Proportional to 549.29, 757.98 and 316.42

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Solution

The fourth proportional to 549.29, 757.98 and 316.42 is: 436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.29 : 757.98 = 316.42 : x
  2. Step 2: Convert to fraction form
    549.29/757.98 = 316.42/x
  3. Step 3: Cross multiply
    549.29x = 757.98 × 316.42
  4. Step 4: Simplify right side
    549.29x = 239,838.14
  5. Step 5: Solve for x
    x = 239,838.14/549.29
  6. Step 6: Final answer
    x = 436.63

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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.