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Finding the Fourth Proportional to 1,080.33, 1,617.39 and 617.28

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Solution

The fourth proportional to 1,080.33, 1,617.39 and 617.28 is: 924.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.33 : 1,617.39 = 617.28 : x
  2. Step 2: Convert to fraction form
    1,080.33/1,617.39 = 617.28/x
  3. Step 3: Cross multiply
    1,080.33x = 1,617.39 × 617.28
  4. Step 4: Simplify right side
    1,080.33x = 998,382.50
  5. Step 5: Solve for x
    x = 998,382.50/1,080.33
  6. Step 6: Final answer
    x = 924.15

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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.