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Finding the Fourth Proportional to 544.29, 815.31 and 389.85

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Solution

The fourth proportional to 544.29, 815.31 and 389.85 is: 583.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.29 : 815.31 = 389.85 : x
  2. Step 2: Convert to fraction form
    544.29/815.31 = 389.85/x
  3. Step 3: Cross multiply
    544.29x = 815.31 × 389.85
  4. Step 4: Simplify right side
    544.29x = 317,848.60
  5. Step 5: Solve for x
    x = 317,848.60/544.29
  6. Step 6: Final answer
    x = 583.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.