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Finding the Fourth Proportional to 341.39, 511.31 and 279.88

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Solution

The fourth proportional to 341.39, 511.31 and 279.88 is: 419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.39 : 511.31 = 279.88 : x
  2. Step 2: Convert to fraction form
    341.39/511.31 = 279.88/x
  3. Step 3: Cross multiply
    341.39x = 511.31 × 279.88
  4. Step 4: Simplify right side
    341.39x = 143,103.29
  5. Step 5: Solve for x
    x = 143,103.29/341.39
  6. Step 6: Final answer
    x = 419.18

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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.