Home / 1,425.20-2,136.26-645.62

Finding the Fourth Proportional to 1,425.20, 2,136.26 and 645.62

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Solution

The fourth proportional to 1,425.20, 2,136.26 and 645.62 is: 967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.20 : 2,136.26 = 645.62 : x
  2. Step 2: Convert to fraction form
    1,425.20/2,136.26 = 645.62/x
  3. Step 3: Cross multiply
    1,425.20x = 2,136.26 × 645.62
  4. Step 4: Simplify right side
    1,425.20x = 1,379,212.18
  5. Step 5: Solve for x
    x = 1,379,212.18/1,425.20
  6. Step 6: Final answer
    x = 967.73

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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.