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Finding the Fourth Proportional to 270.22, 372.87 and 153.74

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Solution

The fourth proportional to 270.22, 372.87 and 153.74 is: 212.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.22 : 372.87 = 153.74 : x
  2. Step 2: Convert to fraction form
    270.22/372.87 = 153.74/x
  3. Step 3: Cross multiply
    270.22x = 372.87 × 153.74
  4. Step 4: Simplify right side
    270.22x = 57,325.03
  5. Step 5: Solve for x
    x = 57,325.03/270.22
  6. Step 6: Final answer
    x = 212.14

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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.