Home / 2,087.16-2,878.92-1,378.68

Finding the Fourth Proportional to 2,087.16, 2,878.92 and 1,378.68

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Solution

The fourth proportional to 2,087.16, 2,878.92 and 1,378.68 is: 1,901.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.16 : 2,878.92 = 1,378.68 : x
  2. Step 2: Convert to fraction form
    2,087.16/2,878.92 = 1,378.68/x
  3. Step 3: Cross multiply
    2,087.16x = 2,878.92 × 1,378.68
  4. Step 4: Simplify right side
    2,087.16x = 3,969,109.43
  5. Step 5: Solve for x
    x = 3,969,109.43/2,087.16
  6. Step 6: Final answer
    x = 1,901.68

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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.