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Finding the Fourth Proportional to 576.56, 863.16 and 448.40

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Solution

The fourth proportional to 576.56, 863.16 and 448.40 is: 671.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.56 : 863.16 = 448.40 : x
  2. Step 2: Convert to fraction form
    576.56/863.16 = 448.40/x
  3. Step 3: Cross multiply
    576.56x = 863.16 × 448.40
  4. Step 4: Simplify right side
    576.56x = 387,040.94
  5. Step 5: Solve for x
    x = 387,040.94/576.56
  6. Step 6: Final answer
    x = 671.29

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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.