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Finding the Fourth Proportional to 1,080.82, 1,621.85 and 456.07

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Solution

The fourth proportional to 1,080.82, 1,621.85 and 456.07 is: 684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.82 : 1,621.85 = 456.07 : x
  2. Step 2: Convert to fraction form
    1,080.82/1,621.85 = 456.07/x
  3. Step 3: Cross multiply
    1,080.82x = 1,621.85 × 456.07
  4. Step 4: Simplify right side
    1,080.82x = 739,682.32
  5. Step 5: Solve for x
    x = 739,682.32/1,080.82
  6. Step 6: Final answer
    x = 684.37

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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.