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Finding the Fourth Proportional to 228.21, 314.80 and 134.93

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Solution

The fourth proportional to 228.21, 314.80 and 134.93 is: 186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.21 : 314.80 = 134.93 : x
  2. Step 2: Convert to fraction form
    228.21/314.80 = 134.93/x
  3. Step 3: Cross multiply
    228.21x = 314.80 × 134.93
  4. Step 4: Simplify right side
    228.21x = 42,475.96
  5. Step 5: Solve for x
    x = 42,475.96/228.21
  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.