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Finding the Fourth Proportional to 1,480.75, 2,221.56 and 440.76

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Solution

The fourth proportional to 1,480.75, 2,221.56 and 440.76 is: 661.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.75 : 2,221.56 = 440.76 : x
  2. Step 2: Convert to fraction form
    1,480.75/2,221.56 = 440.76/x
  3. Step 3: Cross multiply
    1,480.75x = 2,221.56 × 440.76
  4. Step 4: Simplify right side
    1,480.75x = 979,174.79
  5. Step 5: Solve for x
    x = 979,174.79/1,480.75
  6. Step 6: Final answer
    x = 661.27

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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.