Home / 814,245.20-1,221,805.20-340,978.40

Finding the Fourth Proportional to 814,245.20, 1,221,805.20 and 340,978.40

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Solution

The fourth proportional to 814,245.20, 1,221,805.20 and 340,978.40 is: 511,650.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,245.20 : 1,221,805.20 = 340,978.40 : x
  2. Step 2: Convert to fraction form
    814,245.20/1,221,805.20 = 340,978.40/x
  3. Step 3: Cross multiply
    814,245.20x = 1,221,805.20 × 340,978.40
  4. Step 4: Simplify right side
    814,245.20x = 416,609,182,207.68
  5. Step 5: Solve for x
    x = 416,609,182,207.68/814,245.20
  6. Step 6: Final answer
    x = 511,650.77

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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.