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Finding the Fourth Proportional to 767.41, 1,147.87 and 521.17

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Solution

The fourth proportional to 767.41, 1,147.87 and 521.17 is: 779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.41 : 1,147.87 = 521.17 : x
  2. Step 2: Convert to fraction form
    767.41/1,147.87 = 521.17/x
  3. Step 3: Cross multiply
    767.41x = 1,147.87 × 521.17
  4. Step 4: Simplify right side
    767.41x = 598,235.41
  5. Step 5: Solve for x
    x = 598,235.41/767.41
  6. Step 6: Final answer
    x = 779.55

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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.