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Finding the Fourth Proportional to 2,689.52, 3,704.92 and 2,289.90

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Solution

The fourth proportional to 2,689.52, 3,704.92 and 2,289.90 is: 3,154.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.52 : 3,704.92 = 2,289.90 : x
  2. Step 2: Convert to fraction form
    2,689.52/3,704.92 = 2,289.90/x
  3. Step 3: Cross multiply
    2,689.52x = 3,704.92 × 2,289.90
  4. Step 4: Simplify right side
    2,689.52x = 8,483,896.31
  5. Step 5: Solve for x
    x = 8,483,896.31/2,689.52
  6. Step 6: Final answer
    x = 3,154.43

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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.