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Finding the Fourth Proportional to 274.36, 411.54 and 111.93

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Solution

The fourth proportional to 274.36, 411.54 and 111.93 is: 167.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.36 : 411.54 = 111.93 : x
  2. Step 2: Convert to fraction form
    274.36/411.54 = 111.93/x
  3. Step 3: Cross multiply
    274.36x = 411.54 × 111.93
  4. Step 4: Simplify right side
    274.36x = 46,061.61
  5. Step 5: Solve for x
    x = 46,061.61/274.36
  6. Step 6: Final answer
    x = 167.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.