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Finding the Fourth Proportional to 1,604.88, 2,216.55 and 1,080

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Solution

The fourth proportional to 1,604.88, 2,216.55 and 1,080 is: 1,491.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.88 : 2,216.55 = 1,080 : x
  2. Step 2: Convert to fraction form
    1,604.88/2,216.55 = 1,080/x
  3. Step 3: Cross multiply
    1,604.88x = 2,216.55 × 1,080
  4. Step 4: Simplify right side
    1,604.88x = 2,393,874
  5. Step 5: Solve for x
    x = 2,393,874/1,604.88
  6. Step 6: Final answer
    x = 1,491.62

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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.