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Finding the Fourth Proportional to 522.99, 721.71 and 286.94

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Solution

The fourth proportional to 522.99, 721.71 and 286.94 is: 395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.99 : 721.71 = 286.94 : x
  2. Step 2: Convert to fraction form
    522.99/721.71 = 286.94/x
  3. Step 3: Cross multiply
    522.99x = 721.71 × 286.94
  4. Step 4: Simplify right side
    522.99x = 207,083.86
  5. Step 5: Solve for x
    x = 207,083.86/522.99
  6. Step 6: Final answer
    x = 395.96

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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.