Home / 3,123.92-4,312.80-2,331.60

Finding the Fourth Proportional to 3,123.92, 4,312.80 and 2,331.60

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Solution

The fourth proportional to 3,123.92, 4,312.80 and 2,331.60 is: 3,218.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.92 : 4,312.80 = 2,331.60 : x
  2. Step 2: Convert to fraction form
    3,123.92/4,312.80 = 2,331.60/x
  3. Step 3: Cross multiply
    3,123.92x = 4,312.80 × 2,331.60
  4. Step 4: Simplify right side
    3,123.92x = 10,055,724.48
  5. Step 5: Solve for x
    x = 10,055,724.48/3,123.92
  6. Step 6: Final answer
    x = 3,218.94

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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.