Home / 2,785.61-3,842.33-1,878.65

Finding the Fourth Proportional to 2,785.61, 3,842.33 and 1,878.65

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Solution

The fourth proportional to 2,785.61, 3,842.33 and 1,878.65 is: 2,591.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.61 : 3,842.33 = 1,878.65 : x
  2. Step 2: Convert to fraction form
    2,785.61/3,842.33 = 1,878.65/x
  3. Step 3: Cross multiply
    2,785.61x = 3,842.33 × 1,878.65
  4. Step 4: Simplify right side
    2,785.61x = 7,218,393.25
  5. Step 5: Solve for x
    x = 7,218,393.25/2,785.61
  6. Step 6: Final answer
    x = 2,591.32

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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.