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Finding the Fourth Proportional to 48.22, 72.40 and 46.50

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Solution

The fourth proportional to 48.22, 72.40 and 46.50 is: 69.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.22 : 72.40 = 46.50 : x
  2. Step 2: Convert to fraction form
    48.22/72.40 = 46.50/x
  3. Step 3: Cross multiply
    48.22x = 72.40 × 46.50
  4. Step 4: Simplify right side
    48.22x = 3,366.60
  5. Step 5: Solve for x
    x = 3,366.60/48.22
  6. Step 6: Final answer
    x = 69.82

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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.