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Finding the Fourth Proportional to 2,689.21, 3,711.12 and 1,494.21

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Solution

The fourth proportional to 2,689.21, 3,711.12 and 1,494.21 is: 2,062.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.21 : 3,711.12 = 1,494.21 : x
  2. Step 2: Convert to fraction form
    2,689.21/3,711.12 = 1,494.21/x
  3. Step 3: Cross multiply
    2,689.21x = 3,711.12 × 1,494.21
  4. Step 4: Simplify right side
    2,689.21x = 5,545,192.62
  5. Step 5: Solve for x
    x = 5,545,192.62/2,689.21
  6. Step 6: Final answer
    x = 2,062.02

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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.