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Finding the Fourth Proportional to 224.58, 309.78 and 187.92

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Solution

The fourth proportional to 224.58, 309.78 and 187.92 is: 259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.58 : 309.78 = 187.92 : x
  2. Step 2: Convert to fraction form
    224.58/309.78 = 187.92/x
  3. Step 3: Cross multiply
    224.58x = 309.78 × 187.92
  4. Step 4: Simplify right side
    224.58x = 58,213.86
  5. Step 5: Solve for x
    x = 58,213.86/224.58
  6. Step 6: Final answer
    x = 259.21

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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.