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Finding the Fourth Proportional to 2,808.73, 4,212.55 and 959.65

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Solution

The fourth proportional to 2,808.73, 4,212.55 and 959.65 is: 1,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.73 : 4,212.55 = 959.65 : x
  2. Step 2: Convert to fraction form
    2,808.73/4,212.55 = 959.65/x
  3. Step 3: Cross multiply
    2,808.73x = 4,212.55 × 959.65
  4. Step 4: Simplify right side
    2,808.73x = 4,042,573.61
  5. Step 5: Solve for x
    x = 4,042,573.61/2,808.73
  6. Step 6: Final answer
    x = 1,439.29

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1.5x scale

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.