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Finding the Fourth Proportional to 224.32, 309.56 and 135.80

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Solution

The fourth proportional to 224.32, 309.56 and 135.80 is: 187.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.32 : 309.56 = 135.80 : x
  2. Step 2: Convert to fraction form
    224.32/309.56 = 135.80/x
  3. Step 3: Cross multiply
    224.32x = 309.56 × 135.80
  4. Step 4: Simplify right side
    224.32x = 42,038.25
  5. Step 5: Solve for x
    x = 42,038.25/224.32
  6. Step 6: Final answer
    x = 187.40

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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.