Home / 2,619.72-3,615.21-1,440.80

Finding the Fourth Proportional to 2,619.72, 3,615.21 and 1,440.80

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Solution

The fourth proportional to 2,619.72, 3,615.21 and 1,440.80 is: 1,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.72 : 3,615.21 = 1,440.80 : x
  2. Step 2: Convert to fraction form
    2,619.72/3,615.21 = 1,440.80/x
  3. Step 3: Cross multiply
    2,619.72x = 3,615.21 × 1,440.80
  4. Step 4: Simplify right side
    2,619.72x = 5,208,794.57
  5. Step 5: Solve for x
    x = 5,208,794.57/2,619.72
  6. Step 6: Final answer
    x = 1,988.30

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1.5x scale

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.