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Finding the Fourth Proportional to 46.48, 69.67 and 28.42

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Solution

The fourth proportional to 46.48, 69.67 and 28.42 is: 42.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.48 : 69.67 = 28.42 : x
  2. Step 2: Convert to fraction form
    46.48/69.67 = 28.42/x
  3. Step 3: Cross multiply
    46.48x = 69.67 × 28.42
  4. Step 4: Simplify right side
    46.48x = 1,980.02
  5. Step 5: Solve for x
    x = 1,980.02/46.48
  6. Step 6: Final answer
    x = 42.60

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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.