Home / 1,215.81-1,823.72-1,118.61

Finding the Fourth Proportional to 1,215.81, 1,823.72 and 1,118.61

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Solution

The fourth proportional to 1,215.81, 1,823.72 and 1,118.61 is: 1,677.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.81 : 1,823.72 = 1,118.61 : x
  2. Step 2: Convert to fraction form
    1,215.81/1,823.72 = 1,118.61/x
  3. Step 3: Cross multiply
    1,215.81x = 1,823.72 × 1,118.61
  4. Step 4: Simplify right side
    1,215.81x = 2,040,025.84
  5. Step 5: Solve for x
    x = 2,040,025.84/1,215.81
  6. Step 6: Final answer
    x = 1,677.92

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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.