Home / 2,209.30-3,312.87-1,285.18

Finding the Fourth Proportional to 2,209.30, 3,312.87 and 1,285.18

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Solution

The fourth proportional to 2,209.30, 3,312.87 and 1,285.18 is: 1,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.30 : 3,312.87 = 1,285.18 : x
  2. Step 2: Convert to fraction form
    2,209.30/3,312.87 = 1,285.18/x
  3. Step 3: Cross multiply
    2,209.30x = 3,312.87 × 1,285.18
  4. Step 4: Simplify right side
    2,209.30x = 4,257,634.27
  5. Step 5: Solve for x
    x = 4,257,634.27/2,209.30
  6. Step 6: Final answer
    x = 1,927.14

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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.