Home / 840,720.68-1,261,067.62-391,190.12

Finding the Fourth Proportional to 840,720.68, 1,261,067.62 and 391,190.12

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Solution

The fourth proportional to 840,720.68, 1,261,067.62 and 391,190.12 is: 586,778.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,720.68 : 1,261,067.62 = 391,190.12 : x
  2. Step 2: Convert to fraction form
    840,720.68/1,261,067.62 = 391,190.12/x
  3. Step 3: Cross multiply
    840,720.68x = 1,261,067.62 × 391,190.12
  4. Step 4: Simplify right side
    840,720.68x = 493,317,193,595.91
  5. Step 5: Solve for x
    x = 493,317,193,595.91/840,720.68
  6. Step 6: Final answer
    x = 586,778.94

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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.