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Finding the Fourth Proportional to 402.34, 602.94 and 228.76

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Solution

The fourth proportional to 402.34, 602.94 and 228.76 is: 342.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.34 : 602.94 = 228.76 : x
  2. Step 2: Convert to fraction form
    402.34/602.94 = 228.76/x
  3. Step 3: Cross multiply
    402.34x = 602.94 × 228.76
  4. Step 4: Simplify right side
    402.34x = 137,928.55
  5. Step 5: Solve for x
    x = 137,928.55/402.34
  6. Step 6: Final answer
    x = 342.82

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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.