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Finding the Fourth Proportional to 2,080.45, 3,120.47 and 541.45

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Solution

The fourth proportional to 2,080.45, 3,120.47 and 541.45 is: 812.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.45 : 3,120.47 = 541.45 : x
  2. Step 2: Convert to fraction form
    2,080.45/3,120.47 = 541.45/x
  3. Step 3: Cross multiply
    2,080.45x = 3,120.47 × 541.45
  4. Step 4: Simplify right side
    2,080.45x = 1,689,578.48
  5. Step 5: Solve for x
    x = 1,689,578.48/2,080.45
  6. Step 6: Final answer
    x = 812.12

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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.