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Finding the Fourth Proportional to 338.86, 467.67 and 309.70

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Solution

The fourth proportional to 338.86, 467.67 and 309.70 is: 427.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.86 : 467.67 = 309.70 : x
  2. Step 2: Convert to fraction form
    338.86/467.67 = 309.70/x
  3. Step 3: Cross multiply
    338.86x = 467.67 × 309.70
  4. Step 4: Simplify right side
    338.86x = 144,837.40
  5. Step 5: Solve for x
    x = 144,837.40/338.86
  6. Step 6: Final answer
    x = 427.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.