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Finding the Fourth Proportional to 2,645.34, 3,968.01 and 890.03

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Solution

The fourth proportional to 2,645.34, 3,968.01 and 890.03 is: 1,335.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.34 : 3,968.01 = 890.03 : x
  2. Step 2: Convert to fraction form
    2,645.34/3,968.01 = 890.03/x
  3. Step 3: Cross multiply
    2,645.34x = 3,968.01 × 890.03
  4. Step 4: Simplify right side
    2,645.34x = 3,531,628.10
  5. Step 5: Solve for x
    x = 3,531,628.10/2,645.34
  6. Step 6: Final answer
    x = 1,335.04

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Double scale
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Similar ratio
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1.5x scale

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.