Home / 2,085.66-2,878.95-1,387.26

Finding the Fourth Proportional to 2,085.66, 2,878.95 and 1,387.26

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Solution

The fourth proportional to 2,085.66, 2,878.95 and 1,387.26 is: 1,914.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.66 : 2,878.95 = 1,387.26 : x
  2. Step 2: Convert to fraction form
    2,085.66/2,878.95 = 1,387.26/x
  3. Step 3: Cross multiply
    2,085.66x = 2,878.95 × 1,387.26
  4. Step 4: Simplify right side
    2,085.66x = 3,993,852.18
  5. Step 5: Solve for x
    x = 3,993,852.18/2,085.66
  6. Step 6: Final answer
    x = 1,914.91

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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.