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Finding the Fourth Proportional to 549.47, 758.28 and 316.59

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Solution

The fourth proportional to 549.47, 758.28 and 316.59 is: 436.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.47 : 758.28 = 316.59 : x
  2. Step 2: Convert to fraction form
    549.47/758.28 = 316.59/x
  3. Step 3: Cross multiply
    549.47x = 758.28 × 316.59
  4. Step 4: Simplify right side
    549.47x = 240,063.87
  5. Step 5: Solve for x
    x = 240,063.87/549.47
  6. Step 6: Final answer
    x = 436.90

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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.