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Finding the Fourth Proportional to 170.90, 256.31 and 49.13

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Solution

The fourth proportional to 170.90, 256.31 and 49.13 is: 73.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.90 : 256.31 = 49.13 : x
  2. Step 2: Convert to fraction form
    170.90/256.31 = 49.13/x
  3. Step 3: Cross multiply
    170.90x = 256.31 × 49.13
  4. Step 4: Simplify right side
    170.90x = 12,590.98
  5. Step 5: Solve for x
    x = 12,590.98/170.90
  6. Step 6: Final answer
    x = 73.68

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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.