Home / 2,619.63-3,615.09-1,440.78

Finding the Fourth Proportional to 2,619.63, 3,615.09 and 1,440.78

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Solution

The fourth proportional to 2,619.63, 3,615.09 and 1,440.78 is: 1,988.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.63 : 3,615.09 = 1,440.78 : x
  2. Step 2: Convert to fraction form
    2,619.63/3,615.09 = 1,440.78/x
  3. Step 3: Cross multiply
    2,619.63x = 3,615.09 × 1,440.78
  4. Step 4: Simplify right side
    2,619.63x = 5,208,549.37
  5. Step 5: Solve for x
    x = 5,208,549.37/2,619.63
  6. Step 6: Final answer
    x = 1,988.28

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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.