Home / 1,389,736.40-1,917,747.06-777,785.90

Finding the Fourth Proportional to 1,389,736.40, 1,917,747.06 and 777,785.90

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Solution

The fourth proportional to 1,389,736.40, 1,917,747.06 and 777,785.90 is: 1,073,294.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,736.40 : 1,917,747.06 = 777,785.90 : x
  2. Step 2: Convert to fraction form
    1,389,736.40/1,917,747.06 = 777,785.90/x
  3. Step 3: Cross multiply
    1,389,736.40x = 1,917,747.06 × 777,785.90
  4. Step 4: Simplify right side
    1,389,736.40x = 1,491,596,623,034.45
  5. Step 5: Solve for x
    x = 1,491,596,623,034.45/1,389,736.40
  6. Step 6: Final answer
    x = 1,073,294.64

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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.