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Finding the Fourth Proportional to 178.88, 246.90 and 158.22

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Solution

The fourth proportional to 178.88, 246.90 and 158.22 is: 218.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.88 : 246.90 = 158.22 : x
  2. Step 2: Convert to fraction form
    178.88/246.90 = 158.22/x
  3. Step 3: Cross multiply
    178.88x = 246.90 × 158.22
  4. Step 4: Simplify right side
    178.88x = 39,064.22
  5. Step 5: Solve for x
    x = 39,064.22/178.88
  6. Step 6: Final answer
    x = 218.39

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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.