Home / 1,988.91-2,743.88-1,203.08

Finding the Fourth Proportional to 1,988.91, 2,743.88 and 1,203.08

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Solution

The fourth proportional to 1,988.91, 2,743.88 and 1,203.08 is: 1,659.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.91 : 2,743.88 = 1,203.08 : x
  2. Step 2: Convert to fraction form
    1,988.91/2,743.88 = 1,203.08/x
  3. Step 3: Cross multiply
    1,988.91x = 2,743.88 × 1,203.08
  4. Step 4: Simplify right side
    1,988.91x = 3,301,087.42
  5. Step 5: Solve for x
    x = 3,301,087.42/1,988.91
  6. Step 6: Final answer
    x = 1,659.75

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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.