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Finding the Fourth Proportional to 316.85, 475.10 and 100.49

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Solution

The fourth proportional to 316.85, 475.10 and 100.49 is: 150.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.85 : 475.10 = 100.49 : x
  2. Step 2: Convert to fraction form
    316.85/475.10 = 100.49/x
  3. Step 3: Cross multiply
    316.85x = 475.10 × 100.49
  4. Step 4: Simplify right side
    316.85x = 47,742.30
  5. Step 5: Solve for x
    x = 47,742.30/316.85
  6. Step 6: Final answer
    x = 150.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.