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Finding the Fourth Proportional to 525.53, 788.28 and 217.31

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Solution

The fourth proportional to 525.53, 788.28 and 217.31 is: 325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.53 : 788.28 = 217.31 : x
  2. Step 2: Convert to fraction form
    525.53/788.28 = 217.31/x
  3. Step 3: Cross multiply
    525.53x = 788.28 × 217.31
  4. Step 4: Simplify right side
    525.53x = 171,301.13
  5. Step 5: Solve for x
    x = 171,301.13/525.53
  6. Step 6: Final answer
    x = 325.96

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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.