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Finding the Fourth Proportional to 771.82, 1,158.26 and 361.00

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Solution

The fourth proportional to 771.82, 1,158.26 and 361.00 is: 541.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.82 : 1,158.26 = 361.00 : x
  2. Step 2: Convert to fraction form
    771.82/1,158.26 = 361.00/x
  3. Step 3: Cross multiply
    771.82x = 1,158.26 × 361.00
  4. Step 4: Simplify right side
    771.82x = 418,131.50
  5. Step 5: Solve for x
    x = 418,131.50/771.82
  6. Step 6: Final answer
    x = 541.75

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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.