Home / 1,986,120.78-2,976,848.35-918,908.52

Finding the Fourth Proportional to 1,986,120.78, 2,976,848.35 and 918,908.52

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Solution

The fourth proportional to 1,986,120.78, 2,976,848.35 and 918,908.52 is: 1,377,283.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,120.78 : 2,976,848.35 = 918,908.52 : x
  2. Step 2: Convert to fraction form
    1,986,120.78/2,976,848.35 = 918,908.52/x
  3. Step 3: Cross multiply
    1,986,120.78x = 2,976,848.35 × 918,908.52
  4. Step 4: Simplify right side
    1,986,120.78x = 2,735,451,311,562.94
  5. Step 5: Solve for x
    x = 2,735,451,311,562.94/1,986,120.78
  6. Step 6: Final answer
    x = 1,377,283.47

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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.