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Finding the Fourth Proportional to 207.86, 310.65 and 179.15

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Solution

The fourth proportional to 207.86, 310.65 and 179.15 is: 267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.86 : 310.65 = 179.15 : x
  2. Step 2: Convert to fraction form
    207.86/310.65 = 179.15/x
  3. Step 3: Cross multiply
    207.86x = 310.65 × 179.15
  4. Step 4: Simplify right side
    207.86x = 55,652.95
  5. Step 5: Solve for x
    x = 55,652.95/207.86
  6. Step 6: Final answer
    x = 267.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.