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Finding the Fourth Proportional to 4,001.22, 5,520 and 2,385.78

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Solution

The fourth proportional to 4,001.22, 5,520 and 2,385.78 is: 3,291.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,001.22 : 5,520 = 2,385.78 : x
  2. Step 2: Convert to fraction form
    4,001.22/5,520 = 2,385.78/x
  3. Step 3: Cross multiply
    4,001.22x = 5,520 × 2,385.78
  4. Step 4: Simplify right side
    4,001.22x = 13,169,505.60
  5. Step 5: Solve for x
    x = 13,169,505.60/4,001.22
  6. Step 6: Final answer
    x = 3,291.37

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Double scale
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1.5x scale

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.