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Finding the Fourth Proportional to 3,672.96, 5,068.80 and 2,101.20

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Solution

The fourth proportional to 3,672.96, 5,068.80 and 2,101.20 is: 2,899.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,672.96 : 5,068.80 = 2,101.20 : x
  2. Step 2: Convert to fraction form
    3,672.96/5,068.80 = 2,101.20/x
  3. Step 3: Cross multiply
    3,672.96x = 5,068.80 × 2,101.20
  4. Step 4: Simplify right side
    3,672.96x = 10,650,562.56
  5. Step 5: Solve for x
    x = 10,650,562.56/3,672.96
  6. Step 6: Final answer
    x = 2,899.72

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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.