Home / 2,149.68-2,970.36-1,687.44

Finding the Fourth Proportional to 2,149.68, 2,970.36 and 1,687.44

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Solution

The fourth proportional to 2,149.68, 2,970.36 and 1,687.44 is: 2,331.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.68 : 2,970.36 = 1,687.44 : x
  2. Step 2: Convert to fraction form
    2,149.68/2,970.36 = 1,687.44/x
  3. Step 3: Cross multiply
    2,149.68x = 2,970.36 × 1,687.44
  4. Step 4: Simplify right side
    2,149.68x = 5,012,304.28
  5. Step 5: Solve for x
    x = 5,012,304.28/2,149.68
  6. Step 6: Final answer
    x = 2,331.65

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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.