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Finding the Fourth Proportional to 448.70, 619.20 and 252.21

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Solution

The fourth proportional to 448.70, 619.20 and 252.21 is: 348.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.70 : 619.20 = 252.21 : x
  2. Step 2: Convert to fraction form
    448.70/619.20 = 252.21/x
  3. Step 3: Cross multiply
    448.70x = 619.20 × 252.21
  4. Step 4: Simplify right side
    448.70x = 156,168.43
  5. Step 5: Solve for x
    x = 156,168.43/448.70
  6. Step 6: Final answer
    x = 348.05

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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.