Home / 1,039.49-1,434.43-620.02

Finding the Fourth Proportional to 1,039.49, 1,434.43 and 620.02

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Solution

The fourth proportional to 1,039.49, 1,434.43 and 620.02 is: 855.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.49 : 1,434.43 = 620.02 : x
  2. Step 2: Convert to fraction form
    1,039.49/1,434.43 = 620.02/x
  3. Step 3: Cross multiply
    1,039.49x = 1,434.43 × 620.02
  4. Step 4: Simplify right side
    1,039.49x = 889,375.29
  5. Step 5: Solve for x
    x = 889,375.29/1,039.49
  6. Step 6: Final answer
    x = 855.59

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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.