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Finding the Fourth Proportional to 1,108.54, 1,656.79 and 1,020.97

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Solution

The fourth proportional to 1,108.54, 1,656.79 and 1,020.97 is: 1,525.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.54 : 1,656.79 = 1,020.97 : x
  2. Step 2: Convert to fraction form
    1,108.54/1,656.79 = 1,020.97/x
  3. Step 3: Cross multiply
    1,108.54x = 1,656.79 × 1,020.97
  4. Step 4: Simplify right side
    1,108.54x = 1,691,524.60
  5. Step 5: Solve for x
    x = 1,691,524.60/1,108.54
  6. Step 6: Final answer
    x = 1,525.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.