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Finding the Fourth Proportional to 525.38, 787.88 and 217.09

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Solution

The fourth proportional to 525.38, 787.88 and 217.09 is: 325.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.38 : 787.88 = 217.09 : x
  2. Step 2: Convert to fraction form
    525.38/787.88 = 217.09/x
  3. Step 3: Cross multiply
    525.38x = 787.88 × 217.09
  4. Step 4: Simplify right side
    525.38x = 171,040.87
  5. Step 5: Solve for x
    x = 171,040.87/525.38
  6. Step 6: Final answer
    x = 325.56

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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.