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Finding the Fourth Proportional to 157.67, 217.68 and 152.90

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Solution

The fourth proportional to 157.67, 217.68 and 152.90 is: 211.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.67 : 217.68 = 152.90 : x
  2. Step 2: Convert to fraction form
    157.67/217.68 = 152.90/x
  3. Step 3: Cross multiply
    157.67x = 217.68 × 152.90
  4. Step 4: Simplify right side
    157.67x = 33,282.18
  5. Step 5: Solve for x
    x = 33,282.18/157.67
  6. Step 6: Final answer
    x = 211.09

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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.