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Finding the Fourth Proportional to 48.45, 72.22 and 46.47

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Solution

The fourth proportional to 48.45, 72.22 and 46.47 is: 69.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.45 : 72.22 = 46.47 : x
  2. Step 2: Convert to fraction form
    48.45/72.22 = 46.47/x
  3. Step 3: Cross multiply
    48.45x = 72.22 × 46.47
  4. Step 4: Simplify right side
    48.45x = 3,356.06
  5. Step 5: Solve for x
    x = 3,356.06/48.45
  6. Step 6: Final answer
    x = 69.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.