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Finding the Fourth Proportional to 621.64, 927.41 and 548.74

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Solution

The fourth proportional to 621.64, 927.41 and 548.74 is: 818.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.64 : 927.41 = 548.74 : x
  2. Step 2: Convert to fraction form
    621.64/927.41 = 548.74/x
  3. Step 3: Cross multiply
    621.64x = 927.41 × 548.74
  4. Step 4: Simplify right side
    621.64x = 508,906.96
  5. Step 5: Solve for x
    x = 508,906.96/621.64
  6. Step 6: Final answer
    x = 818.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.