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Finding the Fourth Proportional to 270.72, 373.64 and 154.31

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Solution

The fourth proportional to 270.72, 373.64 and 154.31 is: 212.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.72 : 373.64 = 154.31 : x
  2. Step 2: Convert to fraction form
    270.72/373.64 = 154.31/x
  3. Step 3: Cross multiply
    270.72x = 373.64 × 154.31
  4. Step 4: Simplify right side
    270.72x = 57,653.75
  5. Step 5: Solve for x
    x = 57,653.75/270.72
  6. Step 6: Final answer
    x = 212.96

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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.