Home / 1,988.24-2,743.28-1,191.69

Finding the Fourth Proportional to 1,988.24, 2,743.28 and 1,191.69

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Solution

The fourth proportional to 1,988.24, 2,743.28 and 1,191.69 is: 1,644.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.24 : 2,743.28 = 1,191.69 : x
  2. Step 2: Convert to fraction form
    1,988.24/2,743.28 = 1,191.69/x
  3. Step 3: Cross multiply
    1,988.24x = 2,743.28 × 1,191.69
  4. Step 4: Simplify right side
    1,988.24x = 3,269,139.34
  5. Step 5: Solve for x
    x = 3,269,139.34/1,988.24
  6. Step 6: Final answer
    x = 1,644.24

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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.