Home / 1,988.05-2,982.33-653.82

Finding the Fourth Proportional to 1,988.05, 2,982.33 and 653.82

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Solution

The fourth proportional to 1,988.05, 2,982.33 and 653.82 is: 980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.05 : 2,982.33 = 653.82 : x
  2. Step 2: Convert to fraction form
    1,988.05/2,982.33 = 653.82/x
  3. Step 3: Cross multiply
    1,988.05x = 2,982.33 × 653.82
  4. Step 4: Simplify right side
    1,988.05x = 1,949,910.75
  5. Step 5: Solve for x
    x = 1,949,910.75/1,988.05
  6. Step 6: Final answer
    x = 980.81

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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.