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Finding the Fourth Proportional to 2,815.56, 4,223.74 and 868.36

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Solution

The fourth proportional to 2,815.56, 4,223.74 and 868.36 is: 1,302.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.56 : 4,223.74 = 868.36 : x
  2. Step 2: Convert to fraction form
    2,815.56/4,223.74 = 868.36/x
  3. Step 3: Cross multiply
    2,815.56x = 4,223.74 × 868.36
  4. Step 4: Simplify right side
    2,815.56x = 3,667,726.87
  5. Step 5: Solve for x
    x = 3,667,726.87/2,815.56
  6. Step 6: Final answer
    x = 1,302.66

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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.