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Finding the Fourth Proportional to 537.80, 742.19 and 316.80

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Solution

The fourth proportional to 537.80, 742.19 and 316.80 is: 437.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.80 : 742.19 = 316.80 : x
  2. Step 2: Convert to fraction form
    537.80/742.19 = 316.80/x
  3. Step 3: Cross multiply
    537.80x = 742.19 × 316.80
  4. Step 4: Simplify right side
    537.80x = 235,124.21
  5. Step 5: Solve for x
    x = 235,124.21/537.80
  6. Step 6: Final answer
    x = 437.20

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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.