Home / 1,039.26-1,434.12-620.09

Finding the Fourth Proportional to 1,039.26, 1,434.12 and 620.09

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Solution

The fourth proportional to 1,039.26, 1,434.12 and 620.09 is: 855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.26 : 1,434.12 = 620.09 : x
  2. Step 2: Convert to fraction form
    1,039.26/1,434.12 = 620.09/x
  3. Step 3: Cross multiply
    1,039.26x = 1,434.12 × 620.09
  4. Step 4: Simplify right side
    1,039.26x = 889,276.30
  5. Step 5: Solve for x
    x = 889,276.30/1,039.26
  6. Step 6: Final answer
    x = 855.68

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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.