Home / 1,550.79-2,140.02-961.38

Finding the Fourth Proportional to 1,550.79, 2,140.02 and 961.38

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Solution

The fourth proportional to 1,550.79, 2,140.02 and 961.38 is: 1,326.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.79 : 2,140.02 = 961.38 : x
  2. Step 2: Convert to fraction form
    1,550.79/2,140.02 = 961.38/x
  3. Step 3: Cross multiply
    1,550.79x = 2,140.02 × 961.38
  4. Step 4: Simplify right side
    1,550.79x = 2,057,372.43
  5. Step 5: Solve for x
    x = 2,057,372.43/1,550.79
  6. Step 6: Final answer
    x = 1,326.66

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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.