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Finding the Fourth Proportional to 158.64, 220.44 and 156.60

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Solution

The fourth proportional to 158.64, 220.44 and 156.60 is: 217.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.64 : 220.44 = 156.60 : x
  2. Step 2: Convert to fraction form
    158.64/220.44 = 156.60/x
  3. Step 3: Cross multiply
    158.64x = 220.44 × 156.60
  4. Step 4: Simplify right side
    158.64x = 34,520.90
  5. Step 5: Solve for x
    x = 34,520.90/158.64
  6. Step 6: Final answer
    x = 217.61

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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.