Home / 2,818.60-3,892.80-2,380.12

Finding the Fourth Proportional to 2,818.60, 3,892.80 and 2,380.12

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Solution

The fourth proportional to 2,818.60, 3,892.80 and 2,380.12 is: 3,287.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.60 : 3,892.80 = 2,380.12 : x
  2. Step 2: Convert to fraction form
    2,818.60/3,892.80 = 2,380.12/x
  3. Step 3: Cross multiply
    2,818.60x = 3,892.80 × 2,380.12
  4. Step 4: Simplify right side
    2,818.60x = 9,265,331.14
  5. Step 5: Solve for x
    x = 9,265,331.14/2,818.60
  6. Step 6: Final answer
    x = 3,287.21

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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.