Home / 2,181.12-3,008.71-1,297.20

Finding the Fourth Proportional to 2,181.12, 3,008.71 and 1,297.20

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Solution

The fourth proportional to 2,181.12, 3,008.71 and 1,297.20 is: 1,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.12 : 3,008.71 = 1,297.20 : x
  2. Step 2: Convert to fraction form
    2,181.12/3,008.71 = 1,297.20/x
  3. Step 3: Cross multiply
    2,181.12x = 3,008.71 × 1,297.20
  4. Step 4: Simplify right side
    2,181.12x = 3,902,898.61
  5. Step 5: Solve for x
    x = 3,902,898.61/2,181.12
  6. Step 6: Final answer
    x = 1,789.40

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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.