Home / 1,309.75-1,965.53-540.25

Finding the Fourth Proportional to 1,309.75, 1,965.53 and 540.25

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Solution

The fourth proportional to 1,309.75, 1,965.53 and 540.25 is: 810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.75 : 1,965.53 = 540.25 : x
  2. Step 2: Convert to fraction form
    1,309.75/1,965.53 = 540.25/x
  3. Step 3: Cross multiply
    1,309.75x = 1,965.53 × 540.25
  4. Step 4: Simplify right side
    1,309.75x = 1,061,877.58
  5. Step 5: Solve for x
    x = 1,061,877.58/1,309.75
  6. Step 6: Final answer
    x = 810.75

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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.