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Finding the Fourth Proportional to 1,246.82, 1,871.59 and 516.91

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Solution

The fourth proportional to 1,246.82, 1,871.59 and 516.91 is: 775.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.82 : 1,871.59 = 516.91 : x
  2. Step 2: Convert to fraction form
    1,246.82/1,871.59 = 516.91/x
  3. Step 3: Cross multiply
    1,246.82x = 1,871.59 × 516.91
  4. Step 4: Simplify right side
    1,246.82x = 967,435.52
  5. Step 5: Solve for x
    x = 967,435.52/1,246.82
  6. Step 6: Final answer
    x = 775.92

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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.