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Finding the Fourth Proportional to 48.99, 67.55 and 40.22

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Solution

The fourth proportional to 48.99, 67.55 and 40.22 is: 55.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.99 : 67.55 = 40.22 : x
  2. Step 2: Convert to fraction form
    48.99/67.55 = 40.22/x
  3. Step 3: Cross multiply
    48.99x = 67.55 × 40.22
  4. Step 4: Simplify right side
    48.99x = 2,716.86
  5. Step 5: Solve for x
    x = 2,716.86/48.99
  6. Step 6: Final answer
    x = 55.46

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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.