Home / 1,425.32-2,136.90-961.80

Finding the Fourth Proportional to 1,425.32, 2,136.90 and 961.80

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Solution

The fourth proportional to 1,425.32, 2,136.90 and 961.80 is: 1,441.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.32 : 2,136.90 = 961.80 : x
  2. Step 2: Convert to fraction form
    1,425.32/2,136.90 = 961.80/x
  3. Step 3: Cross multiply
    1,425.32x = 2,136.90 × 961.80
  4. Step 4: Simplify right side
    1,425.32x = 2,055,270.42
  5. Step 5: Solve for x
    x = 2,055,270.42/1,425.32
  6. Step 6: Final answer
    x = 1,441.97

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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.