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Finding the Fourth Proportional to 522.03, 782.82 and 261.93

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Solution

The fourth proportional to 522.03, 782.82 and 261.93 is: 392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.03 : 782.82 = 261.93 : x
  2. Step 2: Convert to fraction form
    522.03/782.82 = 261.93/x
  3. Step 3: Cross multiply
    522.03x = 782.82 × 261.93
  4. Step 4: Simplify right side
    522.03x = 205,044.04
  5. Step 5: Solve for x
    x = 205,044.04/522.03
  6. Step 6: Final answer
    x = 392.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.