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Finding the Fourth Proportional to 207.77, 287.04 and 142.46

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Solution

The fourth proportional to 207.77, 287.04 and 142.46 is: 196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.77 : 287.04 = 142.46 : x
  2. Step 2: Convert to fraction form
    207.77/287.04 = 142.46/x
  3. Step 3: Cross multiply
    207.77x = 287.04 × 142.46
  4. Step 4: Simplify right side
    207.77x = 40,891.89
  5. Step 5: Solve for x
    x = 40,891.89/207.77
  6. Step 6: Final answer
    x = 196.82

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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.