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Finding the Fourth Proportional to 619.31, 929.43 and 229.55

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Solution

The fourth proportional to 619.31, 929.43 and 229.55 is: 344.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.31 : 929.43 = 229.55 : x
  2. Step 2: Convert to fraction form
    619.31/929.43 = 229.55/x
  3. Step 3: Cross multiply
    619.31x = 929.43 × 229.55
  4. Step 4: Simplify right side
    619.31x = 213,350.66
  5. Step 5: Solve for x
    x = 213,350.66/619.31
  6. Step 6: Final answer
    x = 344.50

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Similar ratio
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1.5x scale

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.