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Finding the Fourth Proportional to 48.40, 67.12 and 43.60

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Solution

The fourth proportional to 48.40, 67.12 and 43.60 is: 60.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.40 : 67.12 = 43.60 : x
  2. Step 2: Convert to fraction form
    48.40/67.12 = 43.60/x
  3. Step 3: Cross multiply
    48.40x = 67.12 × 43.60
  4. Step 4: Simplify right side
    48.40x = 2,926.43
  5. Step 5: Solve for x
    x = 2,926.43/48.40
  6. Step 6: Final answer
    x = 60.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.