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Finding the Fourth Proportional to 619.90, 929.25 and 229.79

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Solution

The fourth proportional to 619.90, 929.25 and 229.79 is: 344.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.90 : 929.25 = 229.79 : x
  2. Step 2: Convert to fraction form
    619.90/929.25 = 229.79/x
  3. Step 3: Cross multiply
    619.90x = 929.25 × 229.79
  4. Step 4: Simplify right side
    619.90x = 213,532.36
  5. Step 5: Solve for x
    x = 213,532.36/619.90
  6. Step 6: Final answer
    x = 344.46

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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.