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Finding the Fourth Proportional to 779.86, 1,169.87 and 202.74

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Solution

The fourth proportional to 779.86, 1,169.87 and 202.74 is: 304.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.86 : 1,169.87 = 202.74 : x
  2. Step 2: Convert to fraction form
    779.86/1,169.87 = 202.74/x
  3. Step 3: Cross multiply
    779.86x = 1,169.87 × 202.74
  4. Step 4: Simplify right side
    779.86x = 237,179.44
  5. Step 5: Solve for x
    x = 237,179.44/779.86
  6. Step 6: Final answer
    x = 304.13

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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.