Home / 2,787.12-4,180.74-839.32

Finding the Fourth Proportional to 2,787.12, 4,180.74 and 839.32

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Solution

The fourth proportional to 2,787.12, 4,180.74 and 839.32 is: 1,259.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.12 : 4,180.74 = 839.32 : x
  2. Step 2: Convert to fraction form
    2,787.12/4,180.74 = 839.32/x
  3. Step 3: Cross multiply
    2,787.12x = 4,180.74 × 839.32
  4. Step 4: Simplify right side
    2,787.12x = 3,508,978.70
  5. Step 5: Solve for x
    x = 3,508,978.70/2,787.12
  6. Step 6: Final answer
    x = 1,259.00

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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.