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Finding the Fourth Proportional to 523.78, 722.82 and 290.92

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Solution

The fourth proportional to 523.78, 722.82 and 290.92 is: 401.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.78 : 722.82 = 290.92 : x
  2. Step 2: Convert to fraction form
    523.78/722.82 = 290.92/x
  3. Step 3: Cross multiply
    523.78x = 722.82 × 290.92
  4. Step 4: Simplify right side
    523.78x = 210,282.79
  5. Step 5: Solve for x
    x = 210,282.79/523.78
  6. Step 6: Final answer
    x = 401.47

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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.