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Finding the Fourth Proportional to 64.45, 96.72 and 41.57

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Solution

The fourth proportional to 64.45, 96.72 and 41.57 is: 62.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.45 : 96.72 = 41.57 : x
  2. Step 2: Convert to fraction form
    64.45/96.72 = 41.57/x
  3. Step 3: Cross multiply
    64.45x = 96.72 × 41.57
  4. Step 4: Simplify right side
    64.45x = 4,019.96
  5. Step 5: Solve for x
    x = 4,019.96/64.45
  6. Step 6: Final answer
    x = 62.38

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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.