Home / 1,988.40-2,743.88-1,104.15

Finding the Fourth Proportional to 1,988.40, 2,743.88 and 1,104.15

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Solution

The fourth proportional to 1,988.40, 2,743.88 and 1,104.15 is: 1,523.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.40 : 2,743.88 = 1,104.15 : x
  2. Step 2: Convert to fraction form
    1,988.40/2,743.88 = 1,104.15/x
  3. Step 3: Cross multiply
    1,988.40x = 2,743.88 × 1,104.15
  4. Step 4: Simplify right side
    1,988.40x = 3,029,649.58
  5. Step 5: Solve for x
    x = 3,029,649.58/1,988.40
  6. Step 6: Final answer
    x = 1,523.66

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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.