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Finding the Fourth Proportional to 3,387.60, 5,081.40 and 1,079.10

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Solution

The fourth proportional to 3,387.60, 5,081.40 and 1,079.10 is: 1,618.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.60 : 5,081.40 = 1,079.10 : x
  2. Step 2: Convert to fraction form
    3,387.60/5,081.40 = 1,079.10/x
  3. Step 3: Cross multiply
    3,387.60x = 5,081.40 × 1,079.10
  4. Step 4: Simplify right side
    3,387.60x = 5,483,338.74
  5. Step 5: Solve for x
    x = 5,483,338.74/3,387.60
  6. Step 6: Final answer
    x = 1,618.65

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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.