Home / 691,106.28-1,036,800.24-391,720.56

Finding the Fourth Proportional to 691,106.28, 1,036,800.24 and 391,720.56

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Solution

The fourth proportional to 691,106.28, 1,036,800.24 and 391,720.56 is: 587,660.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,106.28 : 1,036,800.24 = 391,720.56 : x
  2. Step 2: Convert to fraction form
    691,106.28/1,036,800.24 = 391,720.56/x
  3. Step 3: Cross multiply
    691,106.28x = 1,036,800.24 × 391,720.56
  4. Step 4: Simplify right side
    691,106.28x = 406,135,970,620.93
  5. Step 5: Solve for x
    x = 406,135,970,620.93/691,106.28
  6. Step 6: Final answer
    x = 587,660.66

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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.