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Finding the Fourth Proportional to 207.01, 285.55 and 129.25

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Solution

The fourth proportional to 207.01, 285.55 and 129.25 is: 178.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.01 : 285.55 = 129.25 : x
  2. Step 2: Convert to fraction form
    207.01/285.55 = 129.25/x
  3. Step 3: Cross multiply
    207.01x = 285.55 × 129.25
  4. Step 4: Simplify right side
    207.01x = 36,907.34
  5. Step 5: Solve for x
    x = 36,907.34/207.01
  6. Step 6: Final answer
    x = 178.29

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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.