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Finding the Fourth Proportional to 3,657.76, 5,486.72 and 1,349.28

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Solution

The fourth proportional to 3,657.76, 5,486.72 and 1,349.28 is: 2,023.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,657.76 : 5,486.72 = 1,349.28 : x
  2. Step 2: Convert to fraction form
    3,657.76/5,486.72 = 1,349.28/x
  3. Step 3: Cross multiply
    3,657.76x = 5,486.72 × 1,349.28
  4. Step 4: Simplify right side
    3,657.76x = 7,403,121.56
  5. Step 5: Solve for x
    x = 7,403,121.56/3,657.76
  6. Step 6: Final answer
    x = 2,023.95

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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.