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Finding the Fourth Proportional to 1,104.78, 1,524.26 and 685.46

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Solution

The fourth proportional to 1,104.78, 1,524.26 and 685.46 is: 945.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.78 : 1,524.26 = 685.46 : x
  2. Step 2: Convert to fraction form
    1,104.78/1,524.26 = 685.46/x
  3. Step 3: Cross multiply
    1,104.78x = 1,524.26 × 685.46
  4. Step 4: Simplify right side
    1,104.78x = 1,044,819.26
  5. Step 5: Solve for x
    x = 1,044,819.26/1,104.78
  6. Step 6: Final answer
    x = 945.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.