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Finding the Fourth Proportional to 1,080.90, 1,621.49 and 532.94

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Solution

The fourth proportional to 1,080.90, 1,621.49 and 532.94 is: 799.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.90 : 1,621.49 = 532.94 : x
  2. Step 2: Convert to fraction form
    1,080.90/1,621.49 = 532.94/x
  3. Step 3: Cross multiply
    1,080.90x = 1,621.49 × 532.94
  4. Step 4: Simplify right side
    1,080.90x = 864,146.11
  5. Step 5: Solve for x
    x = 864,146.11/1,080.90
  6. Step 6: Final answer
    x = 799.47

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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.