Home / 1,551.24-2,139.66-961.56

Finding the Fourth Proportional to 1,551.24, 2,139.66 and 961.56

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Solution

The fourth proportional to 1,551.24, 2,139.66 and 961.56 is: 1,326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.24 : 2,139.66 = 961.56 : x
  2. Step 2: Convert to fraction form
    1,551.24/2,139.66 = 961.56/x
  3. Step 3: Cross multiply
    1,551.24x = 2,139.66 × 961.56
  4. Step 4: Simplify right side
    1,551.24x = 2,057,411.47
  5. Step 5: Solve for x
    x = 2,057,411.47/1,551.24
  6. Step 6: Final answer
    x = 1,326.30

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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.