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Finding the Fourth Proportional to 450.29, 621.41 and 248.39

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Solution

The fourth proportional to 450.29, 621.41 and 248.39 is: 342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.29 : 621.41 = 248.39 : x
  2. Step 2: Convert to fraction form
    450.29/621.41 = 248.39/x
  3. Step 3: Cross multiply
    450.29x = 621.41 × 248.39
  4. Step 4: Simplify right side
    450.29x = 154,354.20
  5. Step 5: Solve for x
    x = 154,354.20/450.29
  6. Step 6: Final answer
    x = 342.79

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Double scale
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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.