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Finding the Fourth Proportional to 775.72, 1,163.60 and 364.72

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Solution

The fourth proportional to 775.72, 1,163.60 and 364.72 is: 547.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.72 : 1,163.60 = 364.72 : x
  2. Step 2: Convert to fraction form
    775.72/1,163.60 = 364.72/x
  3. Step 3: Cross multiply
    775.72x = 1,163.60 × 364.72
  4. Step 4: Simplify right side
    775.72x = 424,388.19
  5. Step 5: Solve for x
    x = 424,388.19/775.72
  6. Step 6: Final answer
    x = 547.09

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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.