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Finding the Fourth Proportional to 3,554.32, 4,905 and 1,982.44

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Solution

The fourth proportional to 3,554.32, 4,905 and 1,982.44 is: 2,735.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,554.32 : 4,905 = 1,982.44 : x
  2. Step 2: Convert to fraction form
    3,554.32/4,905 = 1,982.44/x
  3. Step 3: Cross multiply
    3,554.32x = 4,905 × 1,982.44
  4. Step 4: Simplify right side
    3,554.32x = 9,723,868.20
  5. Step 5: Solve for x
    x = 9,723,868.20/3,554.32
  6. Step 6: Final answer
    x = 2,735.79

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Double scale
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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.