Home / 1,990.40-2,983.17-1,122.89

Finding the Fourth Proportional to 1,990.40, 2,983.17 and 1,122.89

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Solution

The fourth proportional to 1,990.40, 2,983.17 and 1,122.89 is: 1,682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.40 : 2,983.17 = 1,122.89 : x
  2. Step 2: Convert to fraction form
    1,990.40/2,983.17 = 1,122.89/x
  3. Step 3: Cross multiply
    1,990.40x = 2,983.17 × 1,122.89
  4. Step 4: Simplify right side
    1,990.40x = 3,349,771.76
  5. Step 5: Solve for x
    x = 3,349,771.76/1,990.40
  6. Step 6: Final answer
    x = 1,682.96

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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.