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Finding the Fourth Proportional to 220,388.64, 330,451.56 and 87,288

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Solution

The fourth proportional to 220,388.64, 330,451.56 and 87,288 is: 130,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,388.64 : 330,451.56 = 87,288 : x
  2. Step 2: Convert to fraction form
    220,388.64/330,451.56 = 87,288/x
  3. Step 3: Cross multiply
    220,388.64x = 330,451.56 × 87,288
  4. Step 4: Simplify right side
    220,388.64x = 28,844,455,769.28
  5. Step 5: Solve for x
    x = 28,844,455,769.28/220,388.64
  6. Step 6: Final answer
    x = 130,879.96

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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.