Home / 1,214.20-1,817.10-727.60

Finding the Fourth Proportional to 1,214.20, 1,817.10 and 727.60

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Solution

The fourth proportional to 1,214.20, 1,817.10 and 727.60 is: 1,088.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.20 : 1,817.10 = 727.60 : x
  2. Step 2: Convert to fraction form
    1,214.20/1,817.10 = 727.60/x
  3. Step 3: Cross multiply
    1,214.20x = 1,817.10 × 727.60
  4. Step 4: Simplify right side
    1,214.20x = 1,322,121.96
  5. Step 5: Solve for x
    x = 1,322,121.96/1,214.20
  6. Step 6: Final answer
    x = 1,088.88

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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.