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Finding the Fourth Proportional to 159.28, 220.78 and 151.36

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Solution

The fourth proportional to 159.28, 220.78 and 151.36 is: 209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.28 : 220.78 = 151.36 : x
  2. Step 2: Convert to fraction form
    159.28/220.78 = 151.36/x
  3. Step 3: Cross multiply
    159.28x = 220.78 × 151.36
  4. Step 4: Simplify right side
    159.28x = 33,417.26
  5. Step 5: Solve for x
    x = 33,417.26/159.28
  6. Step 6: Final answer
    x = 209.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.