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Finding the Fourth Proportional to 773.83, 1,158.69 and 513.16

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Solution

The fourth proportional to 773.83, 1,158.69 and 513.16 is: 768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.83 : 1,158.69 = 513.16 : x
  2. Step 2: Convert to fraction form
    773.83/1,158.69 = 513.16/x
  3. Step 3: Cross multiply
    773.83x = 1,158.69 × 513.16
  4. Step 4: Simplify right side
    773.83x = 594,593.36
  5. Step 5: Solve for x
    x = 594,593.36/773.83
  6. Step 6: Final answer
    x = 768.38

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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.