Home / 2,129.71-3,192.40-1,349.47

Finding the Fourth Proportional to 2,129.71, 3,192.40 and 1,349.47

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Solution

The fourth proportional to 2,129.71, 3,192.40 and 1,349.47 is: 2,022.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.71 : 3,192.40 = 1,349.47 : x
  2. Step 2: Convert to fraction form
    2,129.71/3,192.40 = 1,349.47/x
  3. Step 3: Cross multiply
    2,129.71x = 3,192.40 × 1,349.47
  4. Step 4: Simplify right side
    2,129.71x = 4,308,048.03
  5. Step 5: Solve for x
    x = 4,308,048.03/2,129.71
  6. Step 6: Final answer
    x = 2,022.83

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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.