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Finding the Fourth Proportional to 2,907.60, 4,361.40 and 2,581.20

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Solution

The fourth proportional to 2,907.60, 4,361.40 and 2,581.20 is: 3,871.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.60 : 4,361.40 = 2,581.20 : x
  2. Step 2: Convert to fraction form
    2,907.60/4,361.40 = 2,581.20/x
  3. Step 3: Cross multiply
    2,907.60x = 4,361.40 × 2,581.20
  4. Step 4: Simplify right side
    2,907.60x = 11,257,645.68
  5. Step 5: Solve for x
    x = 11,257,645.68/2,907.60
  6. Step 6: Final answer
    x = 3,871.80

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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.