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Finding the Fourth Proportional to 2,239.86, 3,359.34 and 779.16

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Solution

The fourth proportional to 2,239.86, 3,359.34 and 779.16 is: 1,168.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.86 : 3,359.34 = 779.16 : x
  2. Step 2: Convert to fraction form
    2,239.86/3,359.34 = 779.16/x
  3. Step 3: Cross multiply
    2,239.86x = 3,359.34 × 779.16
  4. Step 4: Simplify right side
    2,239.86x = 2,617,463.35
  5. Step 5: Solve for x
    x = 2,617,463.35/2,239.86
  6. Step 6: Final answer
    x = 1,168.58

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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.