Home / 1,721.31-2,580.13-1,309.42

Finding the Fourth Proportional to 1,721.31, 2,580.13 and 1,309.42

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Solution

The fourth proportional to 1,721.31, 2,580.13 and 1,309.42 is: 1,962.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.31 : 2,580.13 = 1,309.42 : x
  2. Step 2: Convert to fraction form
    1,721.31/2,580.13 = 1,309.42/x
  3. Step 3: Cross multiply
    1,721.31x = 2,580.13 × 1,309.42
  4. Step 4: Simplify right side
    1,721.31x = 3,378,478.69
  5. Step 5: Solve for x
    x = 3,378,478.69/1,721.31
  6. Step 6: Final answer
    x = 1,962.74

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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.