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Finding the Fourth Proportional to 621.96, 858.41 and 359.93

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Solution

The fourth proportional to 621.96, 858.41 and 359.93 is: 496.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.96 : 858.41 = 359.93 : x
  2. Step 2: Convert to fraction form
    621.96/858.41 = 359.93/x
  3. Step 3: Cross multiply
    621.96x = 858.41 × 359.93
  4. Step 4: Simplify right side
    621.96x = 308,961.42
  5. Step 5: Solve for x
    x = 308,961.42/621.96
  6. Step 6: Final answer
    x = 496.75

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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.