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Finding the Fourth Proportional to 549.57, 758.31 and 316.70

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Solution

The fourth proportional to 549.57, 758.31 and 316.70 is: 436.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.57 : 758.31 = 316.70 : x
  2. Step 2: Convert to fraction form
    549.57/758.31 = 316.70/x
  3. Step 3: Cross multiply
    549.57x = 758.31 × 316.70
  4. Step 4: Simplify right side
    549.57x = 240,152.99
  5. Step 5: Solve for x
    x = 240,152.99/549.57
  6. Step 6: Final answer
    x = 436.98

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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.