Home / 2,988.12-4,480.45-1,139.37

Finding the Fourth Proportional to 2,988.12, 4,480.45 and 1,139.37

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Solution

The fourth proportional to 2,988.12, 4,480.45 and 1,139.37 is: 1,708.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.12 : 4,480.45 = 1,139.37 : x
  2. Step 2: Convert to fraction form
    2,988.12/4,480.45 = 1,139.37/x
  3. Step 3: Cross multiply
    2,988.12x = 4,480.45 × 1,139.37
  4. Step 4: Simplify right side
    2,988.12x = 5,104,870.67
  5. Step 5: Solve for x
    x = 5,104,870.67/2,988.12
  6. Step 6: Final answer
    x = 1,708.39

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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.