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Finding the Fourth Proportional to 779.10, 1,168.92 and 259.08

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Solution

The fourth proportional to 779.10, 1,168.92 and 259.08 is: 388.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.10 : 1,168.92 = 259.08 : x
  2. Step 2: Convert to fraction form
    779.10/1,168.92 = 259.08/x
  3. Step 3: Cross multiply
    779.10x = 1,168.92 × 259.08
  4. Step 4: Simplify right side
    779.10x = 302,843.79
  5. Step 5: Solve for x
    x = 302,843.79/779.10
  6. Step 6: Final answer
    x = 388.71

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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.