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Finding the Fourth Proportional to 228.17, 341.91 and 91.08

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Solution

The fourth proportional to 228.17, 341.91 and 91.08 is: 136.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.17 : 341.91 = 91.08 : x
  2. Step 2: Convert to fraction form
    228.17/341.91 = 91.08/x
  3. Step 3: Cross multiply
    228.17x = 341.91 × 91.08
  4. Step 4: Simplify right side
    228.17x = 31,141.16
  5. Step 5: Solve for x
    x = 31,141.16/228.17
  6. Step 6: Final answer
    x = 136.49

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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.