Home / 1,390,013.21-1,917,229.17-1,275,661.21

Finding the Fourth Proportional to 1,390,013.21, 1,917,229.17 and 1,275,661.21

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Solution

The fourth proportional to 1,390,013.21, 1,917,229.17 and 1,275,661.21 is: 1,759,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,013.21 : 1,917,229.17 = 1,275,661.21 : x
  2. Step 2: Convert to fraction form
    1,390,013.21/1,917,229.17 = 1,275,661.21/x
  3. Step 3: Cross multiply
    1,390,013.21x = 1,917,229.17 × 1,275,661.21
  4. Step 4: Simplify right side
    1,390,013.21x = 2,445,734,882,849.50
  5. Step 5: Solve for x
    x = 2,445,734,882,849.50/1,390,013.21
  6. Step 6: Final answer
    x = 1,759,504.78

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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.