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Finding the Fourth Proportional to 49.60, 68.29 and 39.22

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Solution

The fourth proportional to 49.60, 68.29 and 39.22 is: 54.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.60 : 68.29 = 39.22 : x
  2. Step 2: Convert to fraction form
    49.60/68.29 = 39.22/x
  3. Step 3: Cross multiply
    49.60x = 68.29 × 39.22
  4. Step 4: Simplify right side
    49.60x = 2,678.33
  5. Step 5: Solve for x
    x = 2,678.33/49.60
  6. Step 6: Final answer
    x = 54.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.