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Finding the Fourth Proportional to 185.87, 256.47 and 111.17

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Solution

The fourth proportional to 185.87, 256.47 and 111.17 is: 153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.87 : 256.47 = 111.17 : x
  2. Step 2: Convert to fraction form
    185.87/256.47 = 111.17/x
  3. Step 3: Cross multiply
    185.87x = 256.47 × 111.17
  4. Step 4: Simplify right side
    185.87x = 28,511.77
  5. Step 5: Solve for x
    x = 28,511.77/185.87
  6. Step 6: Final answer
    x = 153.40

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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.