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Finding the Fourth Proportional to 270.11, 372.74 and 153.65

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Solution

The fourth proportional to 270.11, 372.74 and 153.65 is: 212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.11 : 372.74 = 153.65 : x
  2. Step 2: Convert to fraction form
    270.11/372.74 = 153.65/x
  3. Step 3: Cross multiply
    270.11x = 372.74 × 153.65
  4. Step 4: Simplify right side
    270.11x = 57,268.87
  5. Step 5: Solve for x
    x = 57,268.87/270.11
  6. Step 6: Final answer
    x = 212.02

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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.