Home / 1,362.11-2,042.78-387.95

Finding the Fourth Proportional to 1,362.11, 2,042.78 and 387.95

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Solution

The fourth proportional to 1,362.11, 2,042.78 and 387.95 is: 581.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.11 : 2,042.78 = 387.95 : x
  2. Step 2: Convert to fraction form
    1,362.11/2,042.78 = 387.95/x
  3. Step 3: Cross multiply
    1,362.11x = 2,042.78 × 387.95
  4. Step 4: Simplify right side
    1,362.11x = 792,484.35
  5. Step 5: Solve for x
    x = 792,484.35/1,362.11
  6. Step 6: Final answer
    x = 581.81

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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.