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Finding the Fourth Proportional to 155.79, 231.99 and 151.74

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Solution

The fourth proportional to 155.79, 231.99 and 151.74 is: 225.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.79 : 231.99 = 151.74 : x
  2. Step 2: Convert to fraction form
    155.79/231.99 = 151.74/x
  3. Step 3: Cross multiply
    155.79x = 231.99 × 151.74
  4. Step 4: Simplify right side
    155.79x = 35,202.16
  5. Step 5: Solve for x
    x = 35,202.16/155.79
  6. Step 6: Final answer
    x = 225.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.