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Finding the Fourth Proportional to 3,387.69, 5,081.54 and 1,439.64

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Solution

The fourth proportional to 3,387.69, 5,081.54 and 1,439.64 is: 2,159.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.69 : 5,081.54 = 1,439.64 : x
  2. Step 2: Convert to fraction form
    3,387.69/5,081.54 = 1,439.64/x
  3. Step 3: Cross multiply
    3,387.69x = 5,081.54 × 1,439.64
  4. Step 4: Simplify right side
    3,387.69x = 7,315,581.05
  5. Step 5: Solve for x
    x = 7,315,581.05/3,387.69
  6. Step 6: Final answer
    x = 2,159.46

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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.