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Finding the Fourth Proportional to 450.28, 619.86 and 394.92

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Solution

The fourth proportional to 450.28, 619.86 and 394.92 is: 543.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.28 : 619.86 = 394.92 : x
  2. Step 2: Convert to fraction form
    450.28/619.86 = 394.92/x
  3. Step 3: Cross multiply
    450.28x = 619.86 × 394.92
  4. Step 4: Simplify right side
    450.28x = 244,795.11
  5. Step 5: Solve for x
    x = 244,795.11/450.28
  6. Step 6: Final answer
    x = 543.65

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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.