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Finding the Fourth Proportional to 1,097.61, 1,646.43 and 1,080.21

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Solution

The fourth proportional to 1,097.61, 1,646.43 and 1,080.21 is: 1,620.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.61 : 1,646.43 = 1,080.21 : x
  2. Step 2: Convert to fraction form
    1,097.61/1,646.43 = 1,080.21/x
  3. Step 3: Cross multiply
    1,097.61x = 1,646.43 × 1,080.21
  4. Step 4: Simplify right side
    1,097.61x = 1,778,490.15
  5. Step 5: Solve for x
    x = 1,778,490.15/1,097.61
  6. Step 6: Final answer
    x = 1,620.33

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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.