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Finding the Fourth Proportional to 525.69, 788.76 and 217.76

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Solution

The fourth proportional to 525.69, 788.76 and 217.76 is: 326.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.69 : 788.76 = 217.76 : x
  2. Step 2: Convert to fraction form
    525.69/788.76 = 217.76/x
  3. Step 3: Cross multiply
    525.69x = 788.76 × 217.76
  4. Step 4: Simplify right side
    525.69x = 171,762.25
  5. Step 5: Solve for x
    x = 171,762.25/525.69
  6. Step 6: Final answer
    x = 326.74

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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.