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Finding the Fourth Proportional to 776.93, 1,165.61 and 344.19

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Solution

The fourth proportional to 776.93, 1,165.61 and 344.19 is: 516.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.93 : 1,165.61 = 344.19 : x
  2. Step 2: Convert to fraction form
    776.93/1,165.61 = 344.19/x
  3. Step 3: Cross multiply
    776.93x = 1,165.61 × 344.19
  4. Step 4: Simplify right side
    776.93x = 401,191.31
  5. Step 5: Solve for x
    x = 401,191.31/776.93
  6. Step 6: Final answer
    x = 516.38

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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.