Home / 1,425.08-2,136.35-767.31

Finding the Fourth Proportional to 1,425.08, 2,136.35 and 767.31

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Solution

The fourth proportional to 1,425.08, 2,136.35 and 767.31 is: 1,150.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.08 : 2,136.35 = 767.31 : x
  2. Step 2: Convert to fraction form
    1,425.08/2,136.35 = 767.31/x
  3. Step 3: Cross multiply
    1,425.08x = 2,136.35 × 767.31
  4. Step 4: Simplify right side
    1,425.08x = 1,639,238.88
  5. Step 5: Solve for x
    x = 1,639,238.88/1,425.08
  6. Step 6: Final answer
    x = 1,150.28

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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.