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Finding the Fourth Proportional to 178.86, 247.08 and 152.91

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Solution

The fourth proportional to 178.86, 247.08 and 152.91 is: 211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.86 : 247.08 = 152.91 : x
  2. Step 2: Convert to fraction form
    178.86/247.08 = 152.91/x
  3. Step 3: Cross multiply
    178.86x = 247.08 × 152.91
  4. Step 4: Simplify right side
    178.86x = 37,781.00
  5. Step 5: Solve for x
    x = 37,781.00/178.86
  6. Step 6: Final answer
    x = 211.23

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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.