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Finding the Fourth Proportional to 449.61, 621.30 and 338.89

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Solution

The fourth proportional to 449.61, 621.30 and 338.89 is: 468.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.61 : 621.30 = 338.89 : x
  2. Step 2: Convert to fraction form
    449.61/621.30 = 338.89/x
  3. Step 3: Cross multiply
    449.61x = 621.30 × 338.89
  4. Step 4: Simplify right side
    449.61x = 210,553.24
  5. Step 5: Solve for x
    x = 210,553.24/449.61
  6. Step 6: Final answer
    x = 468.31

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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.