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Finding the Fourth Proportional to 207.65, 286.38 and 145.68

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Solution

The fourth proportional to 207.65, 286.38 and 145.68 is: 200.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.65 : 286.38 = 145.68 : x
  2. Step 2: Convert to fraction form
    207.65/286.38 = 145.68/x
  3. Step 3: Cross multiply
    207.65x = 286.38 × 145.68
  4. Step 4: Simplify right side
    207.65x = 41,719.84
  5. Step 5: Solve for x
    x = 41,719.84/207.65
  6. Step 6: Final answer
    x = 200.92

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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.