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Finding the Fourth Proportional to 621.39, 857.49 and 341.63

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Solution

The fourth proportional to 621.39, 857.49 and 341.63 is: 471.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.39 : 857.49 = 341.63 : x
  2. Step 2: Convert to fraction form
    621.39/857.49 = 341.63/x
  3. Step 3: Cross multiply
    621.39x = 857.49 × 341.63
  4. Step 4: Simplify right side
    621.39x = 292,940.02
  5. Step 5: Solve for x
    x = 292,940.02/621.39
  6. Step 6: Final answer
    x = 471.43

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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.