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Finding the Fourth Proportional to 525.20, 787.92 and 217.04

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Solution

The fourth proportional to 525.20, 787.92 and 217.04 is: 325.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.20 : 787.92 = 217.04 : x
  2. Step 2: Convert to fraction form
    525.20/787.92 = 217.04/x
  3. Step 3: Cross multiply
    525.20x = 787.92 × 217.04
  4. Step 4: Simplify right side
    525.20x = 171,010.16
  5. Step 5: Solve for x
    x = 171,010.16/525.20
  6. Step 6: Final answer
    x = 325.61

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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.