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Finding the Fourth Proportional to 621.62, 857.85 and 341.87

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Solution

The fourth proportional to 621.62, 857.85 and 341.87 is: 471.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.62 : 857.85 = 341.87 : x
  2. Step 2: Convert to fraction form
    621.62/857.85 = 341.87/x
  3. Step 3: Cross multiply
    621.62x = 857.85 × 341.87
  4. Step 4: Simplify right side
    621.62x = 293,273.18
  5. Step 5: Solve for x
    x = 293,273.18/621.62
  6. Step 6: Final answer
    x = 471.79

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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.