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Finding the Fourth Proportional to 2,645.16, 3,968.19 and 890.33

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Solution

The fourth proportional to 2,645.16, 3,968.19 and 890.33 is: 1,335.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.16 : 3,968.19 = 890.33 : x
  2. Step 2: Convert to fraction form
    2,645.16/3,968.19 = 890.33/x
  3. Step 3: Cross multiply
    2,645.16x = 3,968.19 × 890.33
  4. Step 4: Simplify right side
    2,645.16x = 3,532,998.60
  5. Step 5: Solve for x
    x = 3,532,998.60/2,645.16
  6. Step 6: Final answer
    x = 1,335.65

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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.