Home / 2,878.09-4,319.27-2,139.41

Finding the Fourth Proportional to 2,878.09, 4,319.27 and 2,139.41

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Solution

The fourth proportional to 2,878.09, 4,319.27 and 2,139.41 is: 3,210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.09 : 4,319.27 = 2,139.41 : x
  2. Step 2: Convert to fraction form
    2,878.09/4,319.27 = 2,139.41/x
  3. Step 3: Cross multiply
    2,878.09x = 4,319.27 × 2,139.41
  4. Step 4: Simplify right side
    2,878.09x = 9,240,689.43
  5. Step 5: Solve for x
    x = 9,240,689.43/2,878.09
  6. Step 6: Final answer
    x = 3,210.70

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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.