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Finding the Fourth Proportional to 513.05, 708.36 and 394.82

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Solution

The fourth proportional to 513.05, 708.36 and 394.82 is: 545.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.05 : 708.36 = 394.82 : x
  2. Step 2: Convert to fraction form
    513.05/708.36 = 394.82/x
  3. Step 3: Cross multiply
    513.05x = 708.36 × 394.82
  4. Step 4: Simplify right side
    513.05x = 279,678.53
  5. Step 5: Solve for x
    x = 279,678.53/513.05
  6. Step 6: Final answer
    x = 545.13

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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.