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Finding the Fourth Proportional to 519.36, 715.90 and 394.52

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Solution

The fourth proportional to 519.36, 715.90 and 394.52 is: 543.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.36 : 715.90 = 394.52 : x
  2. Step 2: Convert to fraction form
    519.36/715.90 = 394.52/x
  3. Step 3: Cross multiply
    519.36x = 715.90 × 394.52
  4. Step 4: Simplify right side
    519.36x = 282,436.87
  5. Step 5: Solve for x
    x = 282,436.87/519.36
  6. Step 6: Final answer
    x = 543.82

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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.