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Finding the Fourth Proportional to 1,103.23, 1,654.79 and 669.47

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Solution

The fourth proportional to 1,103.23, 1,654.79 and 669.47 is: 1,004.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.23 : 1,654.79 = 669.47 : x
  2. Step 2: Convert to fraction form
    1,103.23/1,654.79 = 669.47/x
  3. Step 3: Cross multiply
    1,103.23x = 1,654.79 × 669.47
  4. Step 4: Simplify right side
    1,103.23x = 1,107,838.07
  5. Step 5: Solve for x
    x = 1,107,838.07/1,103.23
  6. Step 6: Final answer
    x = 1,004.18

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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.