Home / 2,085.15-2,878.11-1,377.51

Finding the Fourth Proportional to 2,085.15, 2,878.11 and 1,377.51

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Solution

The fourth proportional to 2,085.15, 2,878.11 and 1,377.51 is: 1,901.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.15 : 2,878.11 = 1,377.51 : x
  2. Step 2: Convert to fraction form
    2,085.15/2,878.11 = 1,377.51/x
  3. Step 3: Cross multiply
    2,085.15x = 2,878.11 × 1,377.51
  4. Step 4: Simplify right side
    2,085.15x = 3,964,625.31
  5. Step 5: Solve for x
    x = 3,964,625.31/2,085.15
  6. Step 6: Final answer
    x = 1,901.36

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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.