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Finding the Fourth Proportional to 40.01, 55.58 and 39.65

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Solution

The fourth proportional to 40.01, 55.58 and 39.65 is: 55.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.01 : 55.58 = 39.65 : x
  2. Step 2: Convert to fraction form
    40.01/55.58 = 39.65/x
  3. Step 3: Cross multiply
    40.01x = 55.58 × 39.65
  4. Step 4: Simplify right side
    40.01x = 2,203.27
  5. Step 5: Solve for x
    x = 2,203.27/40.01
  6. Step 6: Final answer
    x = 55.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.