Home / 1,550.70-2,139.91-961.22

Finding the Fourth Proportional to 1,550.70, 2,139.91 and 961.22

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Solution

The fourth proportional to 1,550.70, 2,139.91 and 961.22 is: 1,326.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.70 : 2,139.91 = 961.22 : x
  2. Step 2: Convert to fraction form
    1,550.70/2,139.91 = 961.22/x
  3. Step 3: Cross multiply
    1,550.70x = 2,139.91 × 961.22
  4. Step 4: Simplify right side
    1,550.70x = 2,056,927.24
  5. Step 5: Solve for x
    x = 2,056,927.24/1,550.70
  6. Step 6: Final answer
    x = 1,326.45

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1.5x scale

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.