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Finding the Fourth Proportional to 454.34, 622.80 and 448.20

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Solution

The fourth proportional to 454.34, 622.80 and 448.20 is: 614.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.34 : 622.80 = 448.20 : x
  2. Step 2: Convert to fraction form
    454.34/622.80 = 448.20/x
  3. Step 3: Cross multiply
    454.34x = 622.80 × 448.20
  4. Step 4: Simplify right side
    454.34x = 279,138.96
  5. Step 5: Solve for x
    x = 279,138.96/454.34
  6. Step 6: Final answer
    x = 614.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.