Home / 1,278,409.06-1,915,786.50-938,785.78

Finding the Fourth Proportional to 1,278,409.06, 1,915,786.50 and 938,785.78

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Solution

The fourth proportional to 1,278,409.06, 1,915,786.50 and 938,785.78 is: 1,406,836.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,409.06 : 1,915,786.50 = 938,785.78 : x
  2. Step 2: Convert to fraction form
    1,278,409.06/1,915,786.50 = 938,785.78/x
  3. Step 3: Cross multiply
    1,278,409.06x = 1,915,786.50 × 938,785.78
  4. Step 4: Simplify right side
    1,278,409.06x = 1,798,513,123,715.97
  5. Step 5: Solve for x
    x = 1,798,513,123,715.97/1,278,409.06
  6. Step 6: Final answer
    x = 1,406,836.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.