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Finding the Fourth Proportional to 1,630.68, 2,446 and 764.38

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Solution

The fourth proportional to 1,630.68, 2,446 and 764.38 is: 1,146.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630.68 : 2,446 = 764.38 : x
  2. Step 2: Convert to fraction form
    1,630.68/2,446 = 764.38/x
  3. Step 3: Cross multiply
    1,630.68x = 2,446 × 764.38
  4. Step 4: Simplify right side
    1,630.68x = 1,869,673.48
  5. Step 5: Solve for x
    x = 1,869,673.48/1,630.68
  6. Step 6: Final answer
    x = 1,146.56

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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.