Home / 1,482.20-2,221.56-1,115.80

Finding the Fourth Proportional to 1,482.20, 2,221.56 and 1,115.80

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Solution

The fourth proportional to 1,482.20, 2,221.56 and 1,115.80 is: 1,672.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,482.20 : 2,221.56 = 1,115.80 : x
  2. Step 2: Convert to fraction form
    1,482.20/2,221.56 = 1,115.80/x
  3. Step 3: Cross multiply
    1,482.20x = 2,221.56 × 1,115.80
  4. Step 4: Simplify right side
    1,482.20x = 2,478,816.65
  5. Step 5: Solve for x
    x = 2,478,816.65/1,482.20
  6. Step 6: Final answer
    x = 1,672.39

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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.