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Finding the Fourth Proportional to 179.86, 247.63 and 156.85

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Solution

The fourth proportional to 179.86, 247.63 and 156.85 is: 215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.86 : 247.63 = 156.85 : x
  2. Step 2: Convert to fraction form
    179.86/247.63 = 156.85/x
  3. Step 3: Cross multiply
    179.86x = 247.63 × 156.85
  4. Step 4: Simplify right side
    179.86x = 38,840.77
  5. Step 5: Solve for x
    x = 38,840.77/179.86
  6. Step 6: Final answer
    x = 215.95

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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.