Home / 1,391,704.83-1,920,520.18-818,781.91

Finding the Fourth Proportional to 1,391,704.83, 1,920,520.18 and 818,781.91

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Solution

The fourth proportional to 1,391,704.83, 1,920,520.18 and 818,781.91 is: 1,129,899.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,704.83 : 1,920,520.18 = 818,781.91 : x
  2. Step 2: Convert to fraction form
    1,391,704.83/1,920,520.18 = 818,781.91/x
  3. Step 3: Cross multiply
    1,391,704.83x = 1,920,520.18 × 818,781.91
  4. Step 4: Simplify right side
    1,391,704.83x = 1,572,487,181,173.94
  5. Step 5: Solve for x
    x = 1,572,487,181,173.94/1,391,704.83
  6. Step 6: Final answer
    x = 1,129,899.92

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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.