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Finding the Fourth Proportional to 211.67, 317.24 and 101.91

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Solution

The fourth proportional to 211.67, 317.24 and 101.91 is: 152.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.67 : 317.24 = 101.91 : x
  2. Step 2: Convert to fraction form
    211.67/317.24 = 101.91/x
  3. Step 3: Cross multiply
    211.67x = 317.24 × 101.91
  4. Step 4: Simplify right side
    211.67x = 32,329.42
  5. Step 5: Solve for x
    x = 32,329.42/211.67
  6. Step 6: Final answer
    x = 152.74

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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.