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Finding the Fourth Proportional to 40.19, 60.59 and 39.65

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Solution

The fourth proportional to 40.19, 60.59 and 39.65 is: 59.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.19 : 60.59 = 39.65 : x
  2. Step 2: Convert to fraction form
    40.19/60.59 = 39.65/x
  3. Step 3: Cross multiply
    40.19x = 60.59 × 39.65
  4. Step 4: Simplify right side
    40.19x = 2,402.39
  5. Step 5: Solve for x
    x = 2,402.39/40.19
  6. Step 6: Final answer
    x = 59.78

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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.