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Finding the Fourth Proportional to 3,602.48, 5,390.42 and 2,191.86

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Solution

The fourth proportional to 3,602.48, 5,390.42 and 2,191.86 is: 3,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,602.48 : 5,390.42 = 2,191.86 : x
  2. Step 2: Convert to fraction form
    3,602.48/5,390.42 = 2,191.86/x
  3. Step 3: Cross multiply
    3,602.48x = 5,390.42 × 2,191.86
  4. Step 4: Simplify right side
    3,602.48x = 11,815,035.02
  5. Step 5: Solve for x
    x = 11,815,035.02/3,602.48
  6. Step 6: Final answer
    x = 3,279.70

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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.