Home / 1,278,698.40-1,920,121.20-926,186.40

Finding the Fourth Proportional to 1,278,698.40, 1,920,121.20 and 926,186.40

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Solution

The fourth proportional to 1,278,698.40, 1,920,121.20 and 926,186.40 is: 1,390,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,698.40 : 1,920,121.20 = 926,186.40 : x
  2. Step 2: Convert to fraction form
    1,278,698.40/1,920,121.20 = 926,186.40/x
  3. Step 3: Cross multiply
    1,278,698.40x = 1,920,121.20 × 926,186.40
  4. Step 4: Simplify right side
    1,278,698.40x = 1,778,390,141,791.68
  5. Step 5: Solve for x
    x = 1,778,390,141,791.68/1,278,698.40
  6. Step 6: Final answer
    x = 1,390,781.55

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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.