Home / 3,479.40-4,801.62-1,987.20

Finding the Fourth Proportional to 3,479.40, 4,801.62 and 1,987.20

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Solution

The fourth proportional to 3,479.40, 4,801.62 and 1,987.20 is: 2,742.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.40 : 4,801.62 = 1,987.20 : x
  2. Step 2: Convert to fraction form
    3,479.40/4,801.62 = 1,987.20/x
  3. Step 3: Cross multiply
    3,479.40x = 4,801.62 × 1,987.20
  4. Step 4: Simplify right side
    3,479.40x = 9,541,779.26
  5. Step 5: Solve for x
    x = 9,541,779.26/3,479.40
  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.