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Finding the Fourth Proportional to 775.14, 1,162.68 and 262.14

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Solution

The fourth proportional to 775.14, 1,162.68 and 262.14 is: 393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.14 : 1,162.68 = 262.14 : x
  2. Step 2: Convert to fraction form
    775.14/1,162.68 = 262.14/x
  3. Step 3: Cross multiply
    775.14x = 1,162.68 × 262.14
  4. Step 4: Simplify right side
    775.14x = 304,784.94
  5. Step 5: Solve for x
    x = 304,784.94/775.14
  6. Step 6: Final answer
    x = 393.20

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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.