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Finding the Fourth Proportional to 1,331.27, 1,996.92 and 509.59

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Solution

The fourth proportional to 1,331.27, 1,996.92 and 509.59 is: 764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.27 : 1,996.92 = 509.59 : x
  2. Step 2: Convert to fraction form
    1,331.27/1,996.92 = 509.59/x
  3. Step 3: Cross multiply
    1,331.27x = 1,996.92 × 509.59
  4. Step 4: Simplify right side
    1,331.27x = 1,017,610.46
  5. Step 5: Solve for x
    x = 1,017,610.46/1,331.27
  6. Step 6: Final answer
    x = 764.39

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1.5x scale

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.