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Finding the Fourth Proportional to 159.76, 220.86 and 152.96

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Solution

The fourth proportional to 159.76, 220.86 and 152.96 is: 211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.76 : 220.86 = 152.96 : x
  2. Step 2: Convert to fraction form
    159.76/220.86 = 152.96/x
  3. Step 3: Cross multiply
    159.76x = 220.86 × 152.96
  4. Step 4: Simplify right side
    159.76x = 33,782.75
  5. Step 5: Solve for x
    x = 33,782.75/159.76
  6. Step 6: Final answer
    x = 211.46

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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.