Home / 2,813.30-4,220.55-865.70

Finding the Fourth Proportional to 2,813.30, 4,220.55 and 865.70

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Solution

The fourth proportional to 2,813.30, 4,220.55 and 865.70 is: 1,298.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.30 : 4,220.55 = 865.70 : x
  2. Step 2: Convert to fraction form
    2,813.30/4,220.55 = 865.70/x
  3. Step 3: Cross multiply
    2,813.30x = 4,220.55 × 865.70
  4. Step 4: Simplify right side
    2,813.30x = 3,653,730.14
  5. Step 5: Solve for x
    x = 3,653,730.14/2,813.30
  6. Step 6: Final answer
    x = 1,298.73

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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.