Home / 1,391,711.48-1,920,529.31-818,788.53

Finding the Fourth Proportional to 1,391,711.48, 1,920,529.31 and 818,788.53

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Solution

The fourth proportional to 1,391,711.48, 1,920,529.31 and 818,788.53 is: 1,129,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,711.48 : 1,920,529.31 = 818,788.53 : x
  2. Step 2: Convert to fraction form
    1,391,711.48/1,920,529.31 = 818,788.53/x
  3. Step 3: Cross multiply
    1,391,711.48x = 1,920,529.31 × 818,788.53
  4. Step 4: Simplify right side
    1,391,711.48x = 1,572,507,366,462.87
  5. Step 5: Solve for x
    x = 1,572,507,366,462.87/1,391,711.48
  6. Step 6: Final answer
    x = 1,129,909.03

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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.