Home / 1,218.89-1,828.33-487.95

Finding the Fourth Proportional to 1,218.89, 1,828.33 and 487.95

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Solution

The fourth proportional to 1,218.89, 1,828.33 and 487.95 is: 731.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.89 : 1,828.33 = 487.95 : x
  2. Step 2: Convert to fraction form
    1,218.89/1,828.33 = 487.95/x
  3. Step 3: Cross multiply
    1,218.89x = 1,828.33 × 487.95
  4. Step 4: Simplify right side
    1,218.89x = 892,133.62
  5. Step 5: Solve for x
    x = 892,133.62/1,218.89
  6. Step 6: Final answer
    x = 731.92

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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.