Home / 2,156.38-2,979.65-1,685.48

Finding the Fourth Proportional to 2,156.38, 2,979.65 and 1,685.48

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Solution

The fourth proportional to 2,156.38, 2,979.65 and 1,685.48 is: 2,328.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.38 : 2,979.65 = 1,685.48 : x
  2. Step 2: Convert to fraction form
    2,156.38/2,979.65 = 1,685.48/x
  3. Step 3: Cross multiply
    2,156.38x = 2,979.65 × 1,685.48
  4. Step 4: Simplify right side
    2,156.38x = 5,022,129.80
  5. Step 5: Solve for x
    x = 5,022,129.80/2,156.38
  6. Step 6: Final answer
    x = 2,328.97

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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.