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Finding the Fourth Proportional to 522.16, 782.77 and 405.97

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Solution

The fourth proportional to 522.16, 782.77 and 405.97 is: 608.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.16 : 782.77 = 405.97 : x
  2. Step 2: Convert to fraction form
    522.16/782.77 = 405.97/x
  3. Step 3: Cross multiply
    522.16x = 782.77 × 405.97
  4. Step 4: Simplify right side
    522.16x = 317,778.13
  5. Step 5: Solve for x
    x = 317,778.13/522.16
  6. Step 6: Final answer
    x = 608.59

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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.