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Finding the Fourth Proportional to 525.85, 788.88 and 217.87

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Solution

The fourth proportional to 525.85, 788.88 and 217.87 is: 326.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.85 : 788.88 = 217.87 : x
  2. Step 2: Convert to fraction form
    525.85/788.88 = 217.87/x
  3. Step 3: Cross multiply
    525.85x = 788.88 × 217.87
  4. Step 4: Simplify right side
    525.85x = 171,873.29
  5. Step 5: Solve for x
    x = 171,873.29/525.85
  6. Step 6: Final answer
    x = 326.85

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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.