Home / 3,587.28-5,380.08-1,278.80

Finding the Fourth Proportional to 3,587.28, 5,380.08 and 1,278.80

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Solution

The fourth proportional to 3,587.28, 5,380.08 and 1,278.80 is: 1,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.28 : 5,380.08 = 1,278.80 : x
  2. Step 2: Convert to fraction form
    3,587.28/5,380.08 = 1,278.80/x
  3. Step 3: Cross multiply
    3,587.28x = 5,380.08 × 1,278.80
  4. Step 4: Simplify right side
    3,587.28x = 6,880,046.30
  5. Step 5: Solve for x
    x = 6,880,046.30/3,587.28
  6. Step 6: Final answer
    x = 1,917.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.