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Finding the Fourth Proportional to 775.33, 1,162.75 and 342.37

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Solution

The fourth proportional to 775.33, 1,162.75 and 342.37 is: 513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.33 : 1,162.75 = 342.37 : x
  2. Step 2: Convert to fraction form
    775.33/1,162.75 = 342.37/x
  3. Step 3: Cross multiply
    775.33x = 1,162.75 × 342.37
  4. Step 4: Simplify right side
    775.33x = 398,090.72
  5. Step 5: Solve for x
    x = 398,090.72/775.33
  6. Step 6: Final answer
    x = 513.45

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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.