Home / 3,180.40-4,385.90-2,060.78

Finding the Fourth Proportional to 3,180.40, 4,385.90 and 2,060.78

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Solution

The fourth proportional to 3,180.40, 4,385.90 and 2,060.78 is: 2,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.40 : 4,385.90 = 2,060.78 : x
  2. Step 2: Convert to fraction form
    3,180.40/4,385.90 = 2,060.78/x
  3. Step 3: Cross multiply
    3,180.40x = 4,385.90 × 2,060.78
  4. Step 4: Simplify right side
    3,180.40x = 9,038,358.22
  5. Step 5: Solve for x
    x = 9,038,358.22/3,180.40
  6. Step 6: Final answer
    x = 2,841.90

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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.