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Finding the Fourth Proportional to 64.06, 88.42 and 40.73

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Solution

The fourth proportional to 64.06, 88.42 and 40.73 is: 56.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.06 : 88.42 = 40.73 : x
  2. Step 2: Convert to fraction form
    64.06/88.42 = 40.73/x
  3. Step 3: Cross multiply
    64.06x = 88.42 × 40.73
  4. Step 4: Simplify right side
    64.06x = 3,601.47
  5. Step 5: Solve for x
    x = 3,601.47/64.06
  6. Step 6: Final answer
    x = 56.22

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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.