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Finding the Fourth Proportional to 211.38, 316.89 and 101.58

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Solution

The fourth proportional to 211.38, 316.89 and 101.58 is: 152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.38 : 316.89 = 101.58 : x
  2. Step 2: Convert to fraction form
    211.38/316.89 = 101.58/x
  3. Step 3: Cross multiply
    211.38x = 316.89 × 101.58
  4. Step 4: Simplify right side
    211.38x = 32,189.69
  5. Step 5: Solve for x
    x = 32,189.69/211.38
  6. Step 6: Final answer
    x = 152.28

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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.