Home / 2,781.20-4,176.60-1,485.20

Finding the Fourth Proportional to 2,781.20, 4,176.60 and 1,485.20

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Solution

The fourth proportional to 2,781.20, 4,176.60 and 1,485.20 is: 2,230.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.20 : 4,176.60 = 1,485.20 : x
  2. Step 2: Convert to fraction form
    2,781.20/4,176.60 = 1,485.20/x
  3. Step 3: Cross multiply
    2,781.20x = 4,176.60 × 1,485.20
  4. Step 4: Simplify right side
    2,781.20x = 6,203,086.32
  5. Step 5: Solve for x
    x = 6,203,086.32/2,781.20
  6. Step 6: Final answer
    x = 2,230.36

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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.