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Finding the Fourth Proportional to 449.20, 619.12 and 338.48

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Solution

The fourth proportional to 449.20, 619.12 and 338.48 is: 466.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.20 : 619.12 = 338.48 : x
  2. Step 2: Convert to fraction form
    449.20/619.12 = 338.48/x
  3. Step 3: Cross multiply
    449.20x = 619.12 × 338.48
  4. Step 4: Simplify right side
    449.20x = 209,559.74
  5. Step 5: Solve for x
    x = 209,559.74/449.20
  6. Step 6: Final answer
    x = 466.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.