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Finding the Fourth Proportional to 178.44, 245.88 and 155.04

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Solution

The fourth proportional to 178.44, 245.88 and 155.04 is: 213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.44 : 245.88 = 155.04 : x
  2. Step 2: Convert to fraction form
    178.44/245.88 = 155.04/x
  3. Step 3: Cross multiply
    178.44x = 245.88 × 155.04
  4. Step 4: Simplify right side
    178.44x = 38,121.24
  5. Step 5: Solve for x
    x = 38,121.24/178.44
  6. Step 6: Final answer
    x = 213.64

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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.