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Finding the Fourth Proportional to 338.39, 507.54 and 228.74

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Solution

The fourth proportional to 338.39, 507.54 and 228.74 is: 343.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.39 : 507.54 = 228.74 : x
  2. Step 2: Convert to fraction form
    338.39/507.54 = 228.74/x
  3. Step 3: Cross multiply
    338.39x = 507.54 × 228.74
  4. Step 4: Simplify right side
    338.39x = 116,092.16
  5. Step 5: Solve for x
    x = 116,092.16/338.39
  6. Step 6: Final answer
    x = 343.08

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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.