Home / 1,391,722.74-1,920,544.77-818,799.78

Finding the Fourth Proportional to 1,391,722.74, 1,920,544.77 and 818,799.78

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Solution

The fourth proportional to 1,391,722.74, 1,920,544.77 and 818,799.78 is: 1,129,924.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,722.74 : 1,920,544.77 = 818,799.78 : x
  2. Step 2: Convert to fraction form
    1,391,722.74/1,920,544.77 = 818,799.78/x
  3. Step 3: Cross multiply
    1,391,722.74x = 1,920,544.77 × 818,799.78
  4. Step 4: Simplify right side
    1,391,722.74x = 1,572,541,635,156.15
  5. Step 5: Solve for x
    x = 1,572,541,635,156.15/1,391,722.74
  6. Step 6: Final answer
    x = 1,129,924.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.