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Finding the Fourth Proportional to 621.71, 858.06 and 359.68

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Solution

The fourth proportional to 621.71, 858.06 and 359.68 is: 496.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.71 : 858.06 = 359.68 : x
  2. Step 2: Convert to fraction form
    621.71/858.06 = 359.68/x
  3. Step 3: Cross multiply
    621.71x = 858.06 × 359.68
  4. Step 4: Simplify right side
    621.71x = 308,627.02
  5. Step 5: Solve for x
    x = 308,627.02/621.71
  6. Step 6: Final answer
    x = 496.42

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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.