Home / 1,389,432.71-1,917,375.90-769,265.49

Finding the Fourth Proportional to 1,389,432.71, 1,917,375.90 and 769,265.49

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Solution

The fourth proportional to 1,389,432.71, 1,917,375.90 and 769,265.49 is: 1,061,563.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,432.71 : 1,917,375.90 = 769,265.49 : x
  2. Step 2: Convert to fraction form
    1,389,432.71/1,917,375.90 = 769,265.49/x
  3. Step 3: Cross multiply
    1,389,432.71x = 1,917,375.90 × 769,265.49
  4. Step 4: Simplify right side
    1,389,432.71x = 1,474,971,111,227.69
  5. Step 5: Solve for x
    x = 1,474,971,111,227.69/1,389,432.71
  6. Step 6: Final answer
    x = 1,061,563.54

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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.