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Finding the Fourth Proportional to 305.69, 458.12 and 141.17

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Solution

The fourth proportional to 305.69, 458.12 and 141.17 is: 211.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.69 : 458.12 = 141.17 : x
  2. Step 2: Convert to fraction form
    305.69/458.12 = 141.17/x
  3. Step 3: Cross multiply
    305.69x = 458.12 × 141.17
  4. Step 4: Simplify right side
    305.69x = 64,669.80
  5. Step 5: Solve for x
    x = 64,669.80/305.69
  6. Step 6: Final answer
    x = 211.56

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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.