Home / 1,218.61-1,826.88-487.79

Finding the Fourth Proportional to 1,218.61, 1,826.88 and 487.79

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Solution

The fourth proportional to 1,218.61, 1,826.88 and 487.79 is: 731.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.61 : 1,826.88 = 487.79 : x
  2. Step 2: Convert to fraction form
    1,218.61/1,826.88 = 487.79/x
  3. Step 3: Cross multiply
    1,218.61x = 1,826.88 × 487.79
  4. Step 4: Simplify right side
    1,218.61x = 891,124.66
  5. Step 5: Solve for x
    x = 891,124.66/1,218.61
  6. Step 6: Final answer
    x = 731.27

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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.