Home / 1,391,713.44-1,920,942.48-818,937.76

Finding the Fourth Proportional to 1,391,713.44, 1,920,942.48 and 818,937.76

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Solution

The fourth proportional to 1,391,713.44, 1,920,942.48 and 818,937.76 is: 1,130,356.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,713.44 : 1,920,942.48 = 818,937.76 : x
  2. Step 2: Convert to fraction form
    1,391,713.44/1,920,942.48 = 818,937.76/x
  3. Step 3: Cross multiply
    1,391,713.44x = 1,920,942.48 × 818,937.76
  4. Step 4: Simplify right side
    1,391,713.44x = 1,573,132,331,660.05
  5. Step 5: Solve for x
    x = 1,573,132,331,660.05/1,391,713.44
  6. Step 6: Final answer
    x = 1,130,356.50

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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.