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Finding the Fourth Proportional to 617.62, 852.24 and 421.42

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Solution

The fourth proportional to 617.62, 852.24 and 421.42 is: 581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.62 : 852.24 = 421.42 : x
  2. Step 2: Convert to fraction form
    617.62/852.24 = 421.42/x
  3. Step 3: Cross multiply
    617.62x = 852.24 × 421.42
  4. Step 4: Simplify right side
    617.62x = 359,150.98
  5. Step 5: Solve for x
    x = 359,150.98/617.62
  6. Step 6: Final answer
    x = 581.51

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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.