Home / 1,680.20-2,514.40-1,330.44

Finding the Fourth Proportional to 1,680.20, 2,514.40 and 1,330.44

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Solution

The fourth proportional to 1,680.20, 2,514.40 and 1,330.44 is: 1,990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.20 : 2,514.40 = 1,330.44 : x
  2. Step 2: Convert to fraction form
    1,680.20/2,514.40 = 1,330.44/x
  3. Step 3: Cross multiply
    1,680.20x = 2,514.40 × 1,330.44
  4. Step 4: Simplify right side
    1,680.20x = 3,345,258.34
  5. Step 5: Solve for x
    x = 3,345,258.34/1,680.20
  6. Step 6: Final answer
    x = 1,990.99

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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.