Home / 2,619.90-3,615.36-1,440.90

Finding the Fourth Proportional to 2,619.90, 3,615.36 and 1,440.90

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Solution

The fourth proportional to 2,619.90, 3,615.36 and 1,440.90 is: 1,988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.90 : 3,615.36 = 1,440.90 : x
  2. Step 2: Convert to fraction form
    2,619.90/3,615.36 = 1,440.90/x
  3. Step 3: Cross multiply
    2,619.90x = 3,615.36 × 1,440.90
  4. Step 4: Simplify right side
    2,619.90x = 5,209,372.22
  5. Step 5: Solve for x
    x = 5,209,372.22/2,619.90
  6. Step 6: Final answer
    x = 1,988.39

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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.