Home / 1,391,728.27-1,920,552.42-818,805.28

Finding the Fourth Proportional to 1,391,728.27, 1,920,552.42 and 818,805.28

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Solution

The fourth proportional to 1,391,728.27, 1,920,552.42 and 818,805.28 is: 1,129,932.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,728.27 : 1,920,552.42 = 818,805.28 : x
  2. Step 2: Convert to fraction form
    1,391,728.27/1,920,552.42 = 818,805.28/x
  3. Step 3: Cross multiply
    1,391,728.27x = 1,920,552.42 × 818,805.28
  4. Step 4: Simplify right side
    1,391,728.27x = 1,572,558,462,012.78
  5. Step 5: Solve for x
    x = 1,572,558,462,012.78/1,391,728.27
  6. Step 6: Final answer
    x = 1,129,932.11

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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.