Home / 2,619.60-3,615.20-1,440.70

Finding the Fourth Proportional to 2,619.60, 3,615.20 and 1,440.70

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Solution

The fourth proportional to 2,619.60, 3,615.20 and 1,440.70 is: 1,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.60 : 3,615.20 = 1,440.70 : x
  2. Step 2: Convert to fraction form
    2,619.60/3,615.20 = 1,440.70/x
  3. Step 3: Cross multiply
    2,619.60x = 3,615.20 × 1,440.70
  4. Step 4: Simplify right side
    2,619.60x = 5,208,418.64
  5. Step 5: Solve for x
    x = 5,208,418.64/2,619.60
  6. Step 6: Final answer
    x = 1,988.25

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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.