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Finding the Fourth Proportional to 178.50, 247.35 and 174.72

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Solution

The fourth proportional to 178.50, 247.35 and 174.72 is: 242.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.50 : 247.35 = 174.72 : x
  2. Step 2: Convert to fraction form
    178.50/247.35 = 174.72/x
  3. Step 3: Cross multiply
    178.50x = 247.35 × 174.72
  4. Step 4: Simplify right side
    178.50x = 43,216.99
  5. Step 5: Solve for x
    x = 43,216.99/178.50
  6. Step 6: Final answer
    x = 242.11

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.