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Finding the Fourth Proportional to 40.64, 55.94 and 38.59

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Solution

The fourth proportional to 40.64, 55.94 and 38.59 is: 53.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.64 : 55.94 = 38.59 : x
  2. Step 2: Convert to fraction form
    40.64/55.94 = 38.59/x
  3. Step 3: Cross multiply
    40.64x = 55.94 × 38.59
  4. Step 4: Simplify right side
    40.64x = 2,158.72
  5. Step 5: Solve for x
    x = 2,158.72/40.64
  6. Step 6: Final answer
    x = 53.12

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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.