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Finding the Fourth Proportional to 228.31, 342.07 and 159.71

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Solution

The fourth proportional to 228.31, 342.07 and 159.71 is: 239.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.31 : 342.07 = 159.71 : x
  2. Step 2: Convert to fraction form
    228.31/342.07 = 159.71/x
  3. Step 3: Cross multiply
    228.31x = 342.07 × 159.71
  4. Step 4: Simplify right side
    228.31x = 54,629.89
  5. Step 5: Solve for x
    x = 54,629.89/228.31
  6. Step 6: Final answer
    x = 239.28

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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.