Home / 691,105.47-1,036,799.16-391,719.75

Finding the Fourth Proportional to 691,105.47, 1,036,799.16 and 391,719.75

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Solution

The fourth proportional to 691,105.47, 1,036,799.16 and 391,719.75 is: 587,659.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,105.47 : 1,036,799.16 = 391,719.75 : x
  2. Step 2: Convert to fraction form
    691,105.47/1,036,799.16 = 391,719.75/x
  3. Step 3: Cross multiply
    691,105.47x = 1,036,799.16 × 391,719.75
  4. Step 4: Simplify right side
    691,105.47x = 406,134,707,755.41
  5. Step 5: Solve for x
    x = 406,134,707,755.41/691,105.47
  6. Step 6: Final answer
    x = 587,659.52

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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.