Home / 1,920.83-2,650.40-1,247.36

Finding the Fourth Proportional to 1,920.83, 2,650.40 and 1,247.36

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Solution

The fourth proportional to 1,920.83, 2,650.40 and 1,247.36 is: 1,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.83 : 2,650.40 = 1,247.36 : x
  2. Step 2: Convert to fraction form
    1,920.83/2,650.40 = 1,247.36/x
  3. Step 3: Cross multiply
    1,920.83x = 2,650.40 × 1,247.36
  4. Step 4: Simplify right side
    1,920.83x = 3,305,983.46
  5. Step 5: Solve for x
    x = 3,305,983.46/1,920.83
  6. Step 6: Final answer
    x = 1,721.13

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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.