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Finding the Fourth Proportional to 775.19, 1,162.23 and 288.11

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Solution

The fourth proportional to 775.19, 1,162.23 and 288.11 is: 431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.19 : 1,162.23 = 288.11 : x
  2. Step 2: Convert to fraction form
    775.19/1,162.23 = 288.11/x
  3. Step 3: Cross multiply
    775.19x = 1,162.23 × 288.11
  4. Step 4: Simplify right side
    775.19x = 334,844.27
  5. Step 5: Solve for x
    x = 334,844.27/775.19
  6. Step 6: Final answer
    x = 431.95

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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.