Home / 1,218.50-1,827.32-487.88

Finding the Fourth Proportional to 1,218.50, 1,827.32 and 487.88

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Solution

The fourth proportional to 1,218.50, 1,827.32 and 487.88 is: 731.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.50 : 1,827.32 = 487.88 : x
  2. Step 2: Convert to fraction form
    1,218.50/1,827.32 = 487.88/x
  3. Step 3: Cross multiply
    1,218.50x = 1,827.32 × 487.88
  4. Step 4: Simplify right side
    1,218.50x = 891,512.88
  5. Step 5: Solve for x
    x = 891,512.88/1,218.50
  6. Step 6: Final answer
    x = 731.65

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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.