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Finding the Fourth Proportional to 2,612.40, 3,918.60 and 881.04

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Solution

The fourth proportional to 2,612.40, 3,918.60 and 881.04 is: 1,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.40 : 3,918.60 = 881.04 : x
  2. Step 2: Convert to fraction form
    2,612.40/3,918.60 = 881.04/x
  3. Step 3: Cross multiply
    2,612.40x = 3,918.60 × 881.04
  4. Step 4: Simplify right side
    2,612.40x = 3,452,443.34
  5. Step 5: Solve for x
    x = 3,452,443.34/2,612.40
  6. Step 6: Final answer
    x = 1,321.56

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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.