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Finding the Fourth Proportional to 1,080.62, 1,620.88 and 300.66

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Solution

The fourth proportional to 1,080.62, 1,620.88 and 300.66 is: 450.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.62 : 1,620.88 = 300.66 : x
  2. Step 2: Convert to fraction form
    1,080.62/1,620.88 = 300.66/x
  3. Step 3: Cross multiply
    1,080.62x = 1,620.88 × 300.66
  4. Step 4: Simplify right side
    1,080.62x = 487,333.78
  5. Step 5: Solve for x
    x = 487,333.78/1,080.62
  6. Step 6: Final answer
    x = 450.98

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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.