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Finding the Fourth Proportional to 207.95, 287.35 and 178.79

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Solution

The fourth proportional to 207.95, 287.35 and 178.79 is: 247.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.95 : 287.35 = 178.79 : x
  2. Step 2: Convert to fraction form
    207.95/287.35 = 178.79/x
  3. Step 3: Cross multiply
    207.95x = 287.35 × 178.79
  4. Step 4: Simplify right side
    207.95x = 51,376.25
  5. Step 5: Solve for x
    x = 51,376.25/207.95
  6. Step 6: Final answer
    x = 247.05

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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.