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Finding the Fourth Proportional to 3,980.39, 5,493.53 and 2,865.02

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Solution

The fourth proportional to 3,980.39, 5,493.53 and 2,865.02 is: 3,954.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.39 : 5,493.53 = 2,865.02 : x
  2. Step 2: Convert to fraction form
    3,980.39/5,493.53 = 2,865.02/x
  3. Step 3: Cross multiply
    3,980.39x = 5,493.53 × 2,865.02
  4. Step 4: Simplify right side
    3,980.39x = 15,739,053.02
  5. Step 5: Solve for x
    x = 15,739,053.02/3,980.39
  6. Step 6: Final answer
    x = 3,954.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.