Home / 1,040.13-1,434.83-620.28

Finding the Fourth Proportional to 1,040.13, 1,434.83 and 620.28

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Solution

The fourth proportional to 1,040.13, 1,434.83 and 620.28 is: 855.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.13 : 1,434.83 = 620.28 : x
  2. Step 2: Convert to fraction form
    1,040.13/1,434.83 = 620.28/x
  3. Step 3: Cross multiply
    1,040.13x = 1,434.83 × 620.28
  4. Step 4: Simplify right side
    1,040.13x = 889,993.25
  5. Step 5: Solve for x
    x = 889,993.25/1,040.13
  6. Step 6: Final answer
    x = 855.66

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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.