Home / 2,988.20-4,482.12-1,139.50

Finding the Fourth Proportional to 2,988.20, 4,482.12 and 1,139.50

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Solution

The fourth proportional to 2,988.20, 4,482.12 and 1,139.50 is: 1,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.20 : 4,482.12 = 1,139.50 : x
  2. Step 2: Convert to fraction form
    2,988.20/4,482.12 = 1,139.50/x
  3. Step 3: Cross multiply
    2,988.20x = 4,482.12 × 1,139.50
  4. Step 4: Simplify right side
    2,988.20x = 5,107,365.10
  5. Step 5: Solve for x
    x = 5,107,365.10/2,988.20
  6. Step 6: Final answer
    x = 1,709.18

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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.