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Finding the Fourth Proportional to 228.17, 342.26 and 83.89

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Solution

The fourth proportional to 228.17, 342.26 and 83.89 is: 125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.17 : 342.26 = 83.89 : x
  2. Step 2: Convert to fraction form
    228.17/342.26 = 83.89/x
  3. Step 3: Cross multiply
    228.17x = 342.26 × 83.89
  4. Step 4: Simplify right side
    228.17x = 28,712.51
  5. Step 5: Solve for x
    x = 28,712.51/228.17
  6. Step 6: Final answer
    x = 125.84

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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.