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Finding the Fourth Proportional to 621.52, 857.60 and 359.56

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Solution

The fourth proportional to 621.52, 857.60 and 359.56 is: 496.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.52 : 857.60 = 359.56 : x
  2. Step 2: Convert to fraction form
    621.52/857.60 = 359.56/x
  3. Step 3: Cross multiply
    621.52x = 857.60 × 359.56
  4. Step 4: Simplify right side
    621.52x = 308,358.66
  5. Step 5: Solve for x
    x = 308,358.66/621.52
  6. Step 6: Final answer
    x = 496.14

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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.