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Finding the Fourth Proportional to 2,689.44, 3,711.44 and 1,478.24

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Solution

The fourth proportional to 2,689.44, 3,711.44 and 1,478.24 is: 2,039.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.44 : 3,711.44 = 1,478.24 : x
  2. Step 2: Convert to fraction form
    2,689.44/3,711.44 = 1,478.24/x
  3. Step 3: Cross multiply
    2,689.44x = 3,711.44 × 1,478.24
  4. Step 4: Simplify right side
    2,689.44x = 5,486,399.07
  5. Step 5: Solve for x
    x = 5,486,399.07/2,689.44
  6. Step 6: Final answer
    x = 2,039.98

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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.