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Finding the Fourth Proportional to 228.27, 342.31 and 89.40

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Solution

The fourth proportional to 228.27, 342.31 and 89.40 is: 134.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.27 : 342.31 = 89.40 : x
  2. Step 2: Convert to fraction form
    228.27/342.31 = 89.40/x
  3. Step 3: Cross multiply
    228.27x = 342.31 × 89.40
  4. Step 4: Simplify right side
    228.27x = 30,602.51
  5. Step 5: Solve for x
    x = 30,602.51/228.27
  6. Step 6: Final answer
    x = 134.06

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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.