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Finding the Fourth Proportional to 1,109.43, 1,662.84 and 697.95

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Solution

The fourth proportional to 1,109.43, 1,662.84 and 697.95 is: 1,046.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.43 : 1,662.84 = 697.95 : x
  2. Step 2: Convert to fraction form
    1,109.43/1,662.84 = 697.95/x
  3. Step 3: Cross multiply
    1,109.43x = 1,662.84 × 697.95
  4. Step 4: Simplify right side
    1,109.43x = 1,160,579.18
  5. Step 5: Solve for x
    x = 1,160,579.18/1,109.43
  6. Step 6: Final answer
    x = 1,046.10

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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.