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Finding the Fourth Proportional to 170.70, 256.89 and 153.93

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Solution

The fourth proportional to 170.70, 256.89 and 153.93 is: 231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.70 : 256.89 = 153.93 : x
  2. Step 2: Convert to fraction form
    170.70/256.89 = 153.93/x
  3. Step 3: Cross multiply
    170.70x = 256.89 × 153.93
  4. Step 4: Simplify right side
    170.70x = 39,543.08
  5. Step 5: Solve for x
    x = 39,543.08/170.70
  6. Step 6: Final answer
    x = 231.65

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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.