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Finding the Fourth Proportional to 519.44, 715.72 and 401.43

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Solution

The fourth proportional to 519.44, 715.72 and 401.43 is: 553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.44 : 715.72 = 401.43 : x
  2. Step 2: Convert to fraction form
    519.44/715.72 = 401.43/x
  3. Step 3: Cross multiply
    519.44x = 715.72 × 401.43
  4. Step 4: Simplify right side
    519.44x = 287,313.91
  5. Step 5: Solve for x
    x = 287,313.91/519.44
  6. Step 6: Final answer
    x = 553.12

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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.