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Finding the Fourth Proportional to 525.59, 788.64 and 217.53

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Solution

The fourth proportional to 525.59, 788.64 and 217.53 is: 326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.59 : 788.64 = 217.53 : x
  2. Step 2: Convert to fraction form
    525.59/788.64 = 217.53/x
  3. Step 3: Cross multiply
    525.59x = 788.64 × 217.53
  4. Step 4: Simplify right side
    525.59x = 171,552.86
  5. Step 5: Solve for x
    x = 171,552.86/525.59
  6. Step 6: Final answer
    x = 326.40

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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.