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Finding the Fourth Proportional to 224.32, 309.40 and 157.88

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Solution

The fourth proportional to 224.32, 309.40 and 157.88 is: 217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.32 : 309.40 = 157.88 : x
  2. Step 2: Convert to fraction form
    224.32/309.40 = 157.88/x
  3. Step 3: Cross multiply
    224.32x = 309.40 × 157.88
  4. Step 4: Simplify right side
    224.32x = 48,848.07
  5. Step 5: Solve for x
    x = 48,848.07/224.32
  6. Step 6: Final answer
    x = 217.76

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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.