Home / 324,742.20-485,801.10-280,856.40

Finding the Fourth Proportional to 324,742.20, 485,801.10 and 280,856.40

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Solution

The fourth proportional to 324,742.20, 485,801.10 and 280,856.40 is: 420,149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,742.20 : 485,801.10 = 280,856.40 : x
  2. Step 2: Convert to fraction form
    324,742.20/485,801.10 = 280,856.40/x
  3. Step 3: Cross multiply
    324,742.20x = 485,801.10 × 280,856.40
  4. Step 4: Simplify right side
    324,742.20x = 136,440,348,062.04
  5. Step 5: Solve for x
    x = 136,440,348,062.04/324,742.20
  6. Step 6: Final answer
    x = 420,149.73

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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.