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Finding the Fourth Proportional to 212.28, 317.99 and 125.36

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Solution

The fourth proportional to 212.28, 317.99 and 125.36 is: 187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.28 : 317.99 = 125.36 : x
  2. Step 2: Convert to fraction form
    212.28/317.99 = 125.36/x
  3. Step 3: Cross multiply
    212.28x = 317.99 × 125.36
  4. Step 4: Simplify right side
    212.28x = 39,862.25
  5. Step 5: Solve for x
    x = 39,862.25/212.28
  6. Step 6: Final answer
    x = 187.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.