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Finding the Fourth Proportional to 46.29, 69.78 and 45.59

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Solution

The fourth proportional to 46.29, 69.78 and 45.59 is: 68.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.29 : 69.78 = 45.59 : x
  2. Step 2: Convert to fraction form
    46.29/69.78 = 45.59/x
  3. Step 3: Cross multiply
    46.29x = 69.78 × 45.59
  4. Step 4: Simplify right side
    46.29x = 3,181.27
  5. Step 5: Solve for x
    x = 3,181.27/46.29
  6. Step 6: Final answer
    x = 68.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.