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Finding the Fourth Proportional to 316.85, 437.15 and 185.76

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Solution

The fourth proportional to 316.85, 437.15 and 185.76 is: 256.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.85 : 437.15 = 185.76 : x
  2. Step 2: Convert to fraction form
    316.85/437.15 = 185.76/x
  3. Step 3: Cross multiply
    316.85x = 437.15 × 185.76
  4. Step 4: Simplify right side
    316.85x = 81,205.45
  5. Step 5: Solve for x
    x = 81,205.45/316.85
  6. Step 6: Final answer
    x = 256.29

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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.