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Finding the Fourth Proportional to 621.06, 935.20 and 448.91

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Solution

The fourth proportional to 621.06, 935.20 and 448.91 is: 675.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.06 : 935.20 = 448.91 : x
  2. Step 2: Convert to fraction form
    621.06/935.20 = 448.91/x
  3. Step 3: Cross multiply
    621.06x = 935.20 × 448.91
  4. Step 4: Simplify right side
    621.06x = 419,815.96
  5. Step 5: Solve for x
    x = 419,815.96/621.06
  6. Step 6: Final answer
    x = 675.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.