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Finding the Fourth Proportional to 621.26, 857.28 and 341.44

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Solution

The fourth proportional to 621.26, 857.28 and 341.44 is: 471.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.26 : 857.28 = 341.44 : x
  2. Step 2: Convert to fraction form
    621.26/857.28 = 341.44/x
  3. Step 3: Cross multiply
    621.26x = 857.28 × 341.44
  4. Step 4: Simplify right side
    621.26x = 292,709.68
  5. Step 5: Solve for x
    x = 292,709.68/621.26
  6. Step 6: Final answer
    x = 471.15

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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.