Home / 840,514.20-1,260,005.85-307,906.80

Finding the Fourth Proportional to 840,514.20, 1,260,005.85 and 307,906.80

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Solution

The fourth proportional to 840,514.20, 1,260,005.85 and 307,906.80 is: 461,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,514.20 : 1,260,005.85 = 307,906.80 : x
  2. Step 2: Convert to fraction form
    840,514.20/1,260,005.85 = 307,906.80/x
  3. Step 3: Cross multiply
    840,514.20x = 1,260,005.85 × 307,906.80
  4. Step 4: Simplify right side
    840,514.20x = 387,964,369,254.78
  5. Step 5: Solve for x
    x = 387,964,369,254.78/840,514.20
  6. Step 6: Final answer
    x = 461,579.79

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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.