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Finding the Fourth Proportional to 228.18, 314.81 and 134.91

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Solution

The fourth proportional to 228.18, 314.81 and 134.91 is: 186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.18 : 314.81 = 134.91 : x
  2. Step 2: Convert to fraction form
    228.18/314.81 = 134.91/x
  3. Step 3: Cross multiply
    228.18x = 314.81 × 134.91
  4. Step 4: Simplify right side
    228.18x = 42,470.34
  5. Step 5: Solve for x
    x = 42,470.34/228.18
  6. Step 6: Final answer
    x = 186.13

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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.