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Finding the Fourth Proportional to 2,623.90, 3,934.85 and 868.38

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Solution

The fourth proportional to 2,623.90, 3,934.85 and 868.38 is: 1,302.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,623.90 : 3,934.85 = 868.38 : x
  2. Step 2: Convert to fraction form
    2,623.90/3,934.85 = 868.38/x
  3. Step 3: Cross multiply
    2,623.90x = 3,934.85 × 868.38
  4. Step 4: Simplify right side
    2,623.90x = 3,416,921.03
  5. Step 5: Solve for x
    x = 3,416,921.03/2,623.90
  6. Step 6: Final answer
    x = 1,302.23

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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.