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Finding the Fourth Proportional to 228.13, 314.79 and 134.86

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Solution

The fourth proportional to 228.13, 314.79 and 134.86 is: 186.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.13 : 314.79 = 134.86 : x
  2. Step 2: Convert to fraction form
    228.13/314.79 = 134.86/x
  3. Step 3: Cross multiply
    228.13x = 314.79 × 134.86
  4. Step 4: Simplify right side
    228.13x = 42,452.58
  5. Step 5: Solve for x
    x = 42,452.58/228.13
  6. Step 6: Final answer
    x = 186.09

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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.