Home / 1,162.40-1,747.20-1,140.80

Finding the Fourth Proportional to 1,162.40, 1,747.20 and 1,140.80

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Solution

The fourth proportional to 1,162.40, 1,747.20 and 1,140.80 is: 1,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.40 : 1,747.20 = 1,140.80 : x
  2. Step 2: Convert to fraction form
    1,162.40/1,747.20 = 1,140.80/x
  3. Step 3: Cross multiply
    1,162.40x = 1,747.20 × 1,140.80
  4. Step 4: Simplify right side
    1,162.40x = 1,993,205.76
  5. Step 5: Solve for x
    x = 1,993,205.76/1,162.40
  6. Step 6: Final answer
    x = 1,714.73

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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.