Home / 2,988.40-4,481.08-1,138.12

Finding the Fourth Proportional to 2,988.40, 4,481.08 and 1,138.12

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Solution

The fourth proportional to 2,988.40, 4,481.08 and 1,138.12 is: 1,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.40 : 4,481.08 = 1,138.12 : x
  2. Step 2: Convert to fraction form
    2,988.40/4,481.08 = 1,138.12/x
  3. Step 3: Cross multiply
    2,988.40x = 4,481.08 × 1,138.12
  4. Step 4: Simplify right side
    2,988.40x = 5,100,006.77
  5. Step 5: Solve for x
    x = 5,100,006.77/2,988.40
  6. Step 6: Final answer
    x = 1,706.60

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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.