Home / 1,988.20-2,983.58-1,122.92

Finding the Fourth Proportional to 1,988.20, 2,983.58 and 1,122.92

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Solution

The fourth proportional to 1,988.20, 2,983.58 and 1,122.92 is: 1,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.20 : 2,983.58 = 1,122.92 : x
  2. Step 2: Convert to fraction form
    1,988.20/2,983.58 = 1,122.92/x
  3. Step 3: Cross multiply
    1,988.20x = 2,983.58 × 1,122.92
  4. Step 4: Simplify right side
    1,988.20x = 3,350,321.65
  5. Step 5: Solve for x
    x = 3,350,321.65/1,988.20
  6. Step 6: Final answer
    x = 1,685.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.