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Finding the Fourth Proportional to 489.69, 733.73 and 345.11

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Solution

The fourth proportional to 489.69, 733.73 and 345.11 is: 517.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.69 : 733.73 = 345.11 : x
  2. Step 2: Convert to fraction form
    489.69/733.73 = 345.11/x
  3. Step 3: Cross multiply
    489.69x = 733.73 × 345.11
  4. Step 4: Simplify right side
    489.69x = 253,212.17
  5. Step 5: Solve for x
    x = 253,212.17/489.69
  6. Step 6: Final answer
    x = 517.09

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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.