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Finding the Fourth Proportional to 779.27, 1,169.17 and 292.39

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Solution

The fourth proportional to 779.27, 1,169.17 and 292.39 is: 438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.27 : 1,169.17 = 292.39 : x
  2. Step 2: Convert to fraction form
    779.27/1,169.17 = 292.39/x
  3. Step 3: Cross multiply
    779.27x = 1,169.17 × 292.39
  4. Step 4: Simplify right side
    779.27x = 341,849.96
  5. Step 5: Solve for x
    x = 341,849.96/779.27
  6. Step 6: Final answer
    x = 438.68

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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.