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Finding the Fourth Proportional to 207.65, 286.51 and 124.79

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Solution

The fourth proportional to 207.65, 286.51 and 124.79 is: 172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.65 : 286.51 = 124.79 : x
  2. Step 2: Convert to fraction form
    207.65/286.51 = 124.79/x
  3. Step 3: Cross multiply
    207.65x = 286.51 × 124.79
  4. Step 4: Simplify right side
    207.65x = 35,751.84
  5. Step 5: Solve for x
    x = 35,751.84/207.65
  6. Step 6: Final answer
    x = 172.17

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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.