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Finding the Fourth Proportional to 68.46, 94.44 and 40.45

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Solution

The fourth proportional to 68.46, 94.44 and 40.45 is: 55.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.46 : 94.44 = 40.45 : x
  2. Step 2: Convert to fraction form
    68.46/94.44 = 40.45/x
  3. Step 3: Cross multiply
    68.46x = 94.44 × 40.45
  4. Step 4: Simplify right side
    68.46x = 3,820.10
  5. Step 5: Solve for x
    x = 3,820.10/68.46
  6. Step 6: Final answer
    x = 55.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.