Home / 3,122.32-4,309-1,725.20

Finding the Fourth Proportional to 3,122.32, 4,309 and 1,725.20

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Solution

The fourth proportional to 3,122.32, 4,309 and 1,725.20 is: 2,380.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.32 : 4,309 = 1,725.20 : x
  2. Step 2: Convert to fraction form
    3,122.32/4,309 = 1,725.20/x
  3. Step 3: Cross multiply
    3,122.32x = 4,309 × 1,725.20
  4. Step 4: Simplify right side
    3,122.32x = 7,433,886.80
  5. Step 5: Solve for x
    x = 7,433,886.80/3,122.32
  6. Step 6: Final answer
    x = 2,380.89

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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.