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Finding the Fourth Proportional to 270.72, 373.61 and 154.28

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Solution

The fourth proportional to 270.72, 373.61 and 154.28 is: 212.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.72 : 373.61 = 154.28 : x
  2. Step 2: Convert to fraction form
    270.72/373.61 = 154.28/x
  3. Step 3: Cross multiply
    270.72x = 373.61 × 154.28
  4. Step 4: Simplify right side
    270.72x = 57,641.87
  5. Step 5: Solve for x
    x = 57,641.87/270.72
  6. Step 6: Final answer
    x = 212.92

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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.