Home / 2,085.17-2,865.49-1,988.80

Finding the Fourth Proportional to 2,085.17, 2,865.49 and 1,988.80

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Solution

The fourth proportional to 2,085.17, 2,865.49 and 1,988.80 is: 2,733.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.17 : 2,865.49 = 1,988.80 : x
  2. Step 2: Convert to fraction form
    2,085.17/2,865.49 = 1,988.80/x
  3. Step 3: Cross multiply
    2,085.17x = 2,865.49 × 1,988.80
  4. Step 4: Simplify right side
    2,085.17x = 5,698,886.51
  5. Step 5: Solve for x
    x = 5,698,886.51/2,085.17
  6. Step 6: Final answer
    x = 2,733.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.