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Finding the Fourth Proportional to 2,672.69, 4,006.87 and 1,113.87

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Solution

The fourth proportional to 2,672.69, 4,006.87 and 1,113.87 is: 1,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.69 : 4,006.87 = 1,113.87 : x
  2. Step 2: Convert to fraction form
    2,672.69/4,006.87 = 1,113.87/x
  3. Step 3: Cross multiply
    2,672.69x = 4,006.87 × 1,113.87
  4. Step 4: Simplify right side
    2,672.69x = 4,463,125.05
  5. Step 5: Solve for x
    x = 4,463,125.05/2,672.69
  6. Step 6: Final answer
    x = 1,669.90

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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.