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Finding the Fourth Proportional to 3,478.92, 4,801.31 and 1,987.05

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Solution

The fourth proportional to 3,478.92, 4,801.31 and 1,987.05 is: 2,742.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.92 : 4,801.31 = 1,987.05 : x
  2. Step 2: Convert to fraction form
    3,478.92/4,801.31 = 1,987.05/x
  3. Step 3: Cross multiply
    3,478.92x = 4,801.31 × 1,987.05
  4. Step 4: Simplify right side
    3,478.92x = 9,540,443.04
  5. Step 5: Solve for x
    x = 9,540,443.04/3,478.92
  6. Step 6: Final answer
    x = 2,742.36

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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.