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Finding the Fourth Proportional to 621.06, 931.28 and 374.73

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Solution

The fourth proportional to 621.06, 931.28 and 374.73 is: 561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.06 : 931.28 = 374.73 : x
  2. Step 2: Convert to fraction form
    621.06/931.28 = 374.73/x
  3. Step 3: Cross multiply
    621.06x = 931.28 × 374.73
  4. Step 4: Simplify right side
    621.06x = 348,976.68
  5. Step 5: Solve for x
    x = 348,976.68/621.06
  6. Step 6: Final answer
    x = 561.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.