Home / 1,310.24-1,965.40-540.80

Finding the Fourth Proportional to 1,310.24, 1,965.40 and 540.80

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Solution

The fourth proportional to 1,310.24, 1,965.40 and 540.80 is: 811.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.24 : 1,965.40 = 540.80 : x
  2. Step 2: Convert to fraction form
    1,310.24/1,965.40 = 540.80/x
  3. Step 3: Cross multiply
    1,310.24x = 1,965.40 × 540.80
  4. Step 4: Simplify right side
    1,310.24x = 1,062,888.32
  5. Step 5: Solve for x
    x = 1,062,888.32/1,310.24
  6. Step 6: Final answer
    x = 811.22

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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.