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Finding the Fourth Proportional to 576.98, 796.25 and 315

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Solution

The fourth proportional to 576.98, 796.25 and 315 is: 434.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.98 : 796.25 = 315 : x
  2. Step 2: Convert to fraction form
    576.98/796.25 = 315/x
  3. Step 3: Cross multiply
    576.98x = 796.25 × 315
  4. Step 4: Simplify right side
    576.98x = 250,818.75
  5. Step 5: Solve for x
    x = 250,818.75/576.98
  6. Step 6: Final answer
    x = 434.71

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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.