Home / 1,389,791.31-1,917,944.48-777,928.84

Finding the Fourth Proportional to 1,389,791.31, 1,917,944.48 and 777,928.84

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Solution

The fourth proportional to 1,389,791.31, 1,917,944.48 and 777,928.84 is: 1,073,559.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,791.31 : 1,917,944.48 = 777,928.84 : x
  2. Step 2: Convert to fraction form
    1,389,791.31/1,917,944.48 = 777,928.84/x
  3. Step 3: Cross multiply
    1,389,791.31x = 1,917,944.48 × 777,928.84
  4. Step 4: Simplify right side
    1,389,791.31x = 1,492,024,324,510.80
  5. Step 5: Solve for x
    x = 1,492,024,324,510.80/1,389,791.31
  6. Step 6: Final answer
    x = 1,073,559.98

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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.