Home / 2,918.52-4,377.78-727.20

Finding the Fourth Proportional to 2,918.52, 4,377.78 and 727.20

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Solution

The fourth proportional to 2,918.52, 4,377.78 and 727.20 is: 1,090.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.52 : 4,377.78 = 727.20 : x
  2. Step 2: Convert to fraction form
    2,918.52/4,377.78 = 727.20/x
  3. Step 3: Cross multiply
    2,918.52x = 4,377.78 × 727.20
  4. Step 4: Simplify right side
    2,918.52x = 3,183,521.62
  5. Step 5: Solve for x
    x = 3,183,521.62/2,918.52
  6. Step 6: Final answer
    x = 1,090.80

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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.