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Finding the Fourth Proportional to 338.69, 508.05 and 265.50

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Solution

The fourth proportional to 338.69, 508.05 and 265.50 is: 398.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.69 : 508.05 = 265.50 : x
  2. Step 2: Convert to fraction form
    338.69/508.05 = 265.50/x
  3. Step 3: Cross multiply
    338.69x = 508.05 × 265.50
  4. Step 4: Simplify right side
    338.69x = 134,887.28
  5. Step 5: Solve for x
    x = 134,887.28/338.69
  6. Step 6: Final answer
    x = 398.26

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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.