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Finding the Fourth Proportional to 449.33, 621.12 and 379.77

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Solution

The fourth proportional to 449.33, 621.12 and 379.77 is: 524.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.33 : 621.12 = 379.77 : x
  2. Step 2: Convert to fraction form
    449.33/621.12 = 379.77/x
  3. Step 3: Cross multiply
    449.33x = 621.12 × 379.77
  4. Step 4: Simplify right side
    449.33x = 235,882.74
  5. Step 5: Solve for x
    x = 235,882.74/449.33
  6. Step 6: Final answer
    x = 524.97

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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.