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Finding the Fourth Proportional to 583.92, 805.97 and 394.78

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Solution

The fourth proportional to 583.92, 805.97 and 394.78 is: 544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.92 : 805.97 = 394.78 : x
  2. Step 2: Convert to fraction form
    583.92/805.97 = 394.78/x
  3. Step 3: Cross multiply
    583.92x = 805.97 × 394.78
  4. Step 4: Simplify right side
    583.92x = 318,177.02
  5. Step 5: Solve for x
    x = 318,177.02/583.92
  6. Step 6: Final answer
    x = 544.90

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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.