Home / 1,529.34-2,109.99-939.66

Finding the Fourth Proportional to 1,529.34, 2,109.99 and 939.66

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Solution

The fourth proportional to 1,529.34, 2,109.99 and 939.66 is: 1,296.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.34 : 2,109.99 = 939.66 : x
  2. Step 2: Convert to fraction form
    1,529.34/2,109.99 = 939.66/x
  3. Step 3: Cross multiply
    1,529.34x = 2,109.99 × 939.66
  4. Step 4: Simplify right side
    1,529.34x = 1,982,673.20
  5. Step 5: Solve for x
    x = 1,982,673.20/1,529.34
  6. Step 6: Final answer
    x = 1,296.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.