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Finding the Fourth Proportional to 46.39, 69.68 and 28.39

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Solution

The fourth proportional to 46.39, 69.68 and 28.39 is: 42.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.39 : 69.68 = 28.39 : x
  2. Step 2: Convert to fraction form
    46.39/69.68 = 28.39/x
  3. Step 3: Cross multiply
    46.39x = 69.68 × 28.39
  4. Step 4: Simplify right side
    46.39x = 1,978.07
  5. Step 5: Solve for x
    x = 1,978.07/46.39
  6. Step 6: Final answer
    x = 42.64

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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.