Home / 3,102.40-4,279.44-2,438.20

Finding the Fourth Proportional to 3,102.40, 4,279.44 and 2,438.20

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Solution

The fourth proportional to 3,102.40, 4,279.44 and 2,438.20 is: 3,363.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,102.40 : 4,279.44 = 2,438.20 : x
  2. Step 2: Convert to fraction form
    3,102.40/4,279.44 = 2,438.20/x
  3. Step 3: Cross multiply
    3,102.40x = 4,279.44 × 2,438.20
  4. Step 4: Simplify right side
    3,102.40x = 10,434,130.61
  5. Step 5: Solve for x
    x = 10,434,130.61/3,102.40
  6. Step 6: Final answer
    x = 3,363.24

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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.