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Finding the Fourth Proportional to 621.53, 857.73 and 359.56

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Solution

The fourth proportional to 621.53, 857.73 and 359.56 is: 496.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.53 : 857.73 = 359.56 : x
  2. Step 2: Convert to fraction form
    621.53/857.73 = 359.56/x
  3. Step 3: Cross multiply
    621.53x = 857.73 × 359.56
  4. Step 4: Simplify right side
    621.53x = 308,405.40
  5. Step 5: Solve for x
    x = 308,405.40/621.53
  6. Step 6: Final answer
    x = 496.20

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.