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Finding the Fourth Proportional to 1,603.49, 2,211.81 and 1,105.88

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Solution

The fourth proportional to 1,603.49, 2,211.81 and 1,105.88 is: 1,525.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.49 : 2,211.81 = 1,105.88 : x
  2. Step 2: Convert to fraction form
    1,603.49/2,211.81 = 1,105.88/x
  3. Step 3: Cross multiply
    1,603.49x = 2,211.81 × 1,105.88
  4. Step 4: Simplify right side
    1,603.49x = 2,445,996.44
  5. Step 5: Solve for x
    x = 2,445,996.44/1,603.49
  6. Step 6: Final answer
    x = 1,525.42

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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.