Home / 2,080.16-3,120.60-619.40

Finding the Fourth Proportional to 2,080.16, 3,120.60 and 619.40

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Solution

The fourth proportional to 2,080.16, 3,120.60 and 619.40 is: 929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.16 : 3,120.60 = 619.40 : x
  2. Step 2: Convert to fraction form
    2,080.16/3,120.60 = 619.40/x
  3. Step 3: Cross multiply
    2,080.16x = 3,120.60 × 619.40
  4. Step 4: Simplify right side
    2,080.16x = 1,932,899.64
  5. Step 5: Solve for x
    x = 1,932,899.64/2,080.16
  6. Step 6: Final answer
    x = 929.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.