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Finding the Fourth Proportional to 448.56, 619.20 and 331.92

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Solution

The fourth proportional to 448.56, 619.20 and 331.92 is: 458.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.56 : 619.20 = 331.92 : x
  2. Step 2: Convert to fraction form
    448.56/619.20 = 331.92/x
  3. Step 3: Cross multiply
    448.56x = 619.20 × 331.92
  4. Step 4: Simplify right side
    448.56x = 205,524.86
  5. Step 5: Solve for x
    x = 205,524.86/448.56
  6. Step 6: Final answer
    x = 458.19

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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.