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Finding the Fourth Proportional to 520.88, 787.22 and 511.92

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Solution

The fourth proportional to 520.88, 787.22 and 511.92 is: 773.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.88 : 787.22 = 511.92 : x
  2. Step 2: Convert to fraction form
    520.88/787.22 = 511.92/x
  3. Step 3: Cross multiply
    520.88x = 787.22 × 511.92
  4. Step 4: Simplify right side
    520.88x = 402,993.66
  5. Step 5: Solve for x
    x = 402,993.66/520.88
  6. Step 6: Final answer
    x = 773.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.