Home / 1,540.26-2,124.99-1,009.80

Finding the Fourth Proportional to 1,540.26, 2,124.99 and 1,009.80

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Solution

The fourth proportional to 1,540.26, 2,124.99 and 1,009.80 is: 1,393.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.26 : 2,124.99 = 1,009.80 : x
  2. Step 2: Convert to fraction form
    1,540.26/2,124.99 = 1,009.80/x
  3. Step 3: Cross multiply
    1,540.26x = 2,124.99 × 1,009.80
  4. Step 4: Simplify right side
    1,540.26x = 2,145,814.90
  5. Step 5: Solve for x
    x = 2,145,814.90/1,540.26
  6. Step 6: Final answer
    x = 1,393.15

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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.