Home / 1,040.16-1,434.78-620.25

Finding the Fourth Proportional to 1,040.16, 1,434.78 and 620.25

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Solution

The fourth proportional to 1,040.16, 1,434.78 and 620.25 is: 855.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.16 : 1,434.78 = 620.25 : x
  2. Step 2: Convert to fraction form
    1,040.16/1,434.78 = 620.25/x
  3. Step 3: Cross multiply
    1,040.16x = 1,434.78 × 620.25
  4. Step 4: Simplify right side
    1,040.16x = 889,915.12
  5. Step 5: Solve for x
    x = 889,915.12/1,040.16
  6. Step 6: Final answer
    x = 855.56

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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.