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Finding the Fourth Proportional to 341.42, 511.89 and 121.99

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Solution

The fourth proportional to 341.42, 511.89 and 121.99 is: 182.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.42 : 511.89 = 121.99 : x
  2. Step 2: Convert to fraction form
    341.42/511.89 = 121.99/x
  3. Step 3: Cross multiply
    341.42x = 511.89 × 121.99
  4. Step 4: Simplify right side
    341.42x = 62,444.68
  5. Step 5: Solve for x
    x = 62,444.68/341.42
  6. Step 6: Final answer
    x = 182.90

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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.