Home / 2,787.12-3,842.46-1,790.70

Finding the Fourth Proportional to 2,787.12, 3,842.46 and 1,790.70

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Solution

The fourth proportional to 2,787.12, 3,842.46 and 1,790.70 is: 2,468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.12 : 3,842.46 = 1,790.70 : x
  2. Step 2: Convert to fraction form
    2,787.12/3,842.46 = 1,790.70/x
  3. Step 3: Cross multiply
    2,787.12x = 3,842.46 × 1,790.70
  4. Step 4: Simplify right side
    2,787.12x = 6,880,693.12
  5. Step 5: Solve for x
    x = 6,880,693.12/2,787.12
  6. Step 6: Final answer
    x = 2,468.75

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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.