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Finding the Fourth Proportional to 46.80, 69.78 and 46.38

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Solution

The fourth proportional to 46.80, 69.78 and 46.38 is: 69.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.80 : 69.78 = 46.38 : x
  2. Step 2: Convert to fraction form
    46.80/69.78 = 46.38/x
  3. Step 3: Cross multiply
    46.80x = 69.78 × 46.38
  4. Step 4: Simplify right side
    46.80x = 3,236.40
  5. Step 5: Solve for x
    x = 3,236.40/46.80
  6. Step 6: Final answer
    x = 69.15

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