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Finding the Fourth Proportional to 3,858.88, 5,788.32 and 1,261.76

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Solution

The fourth proportional to 3,858.88, 5,788.32 and 1,261.76 is: 1,892.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.88 : 5,788.32 = 1,261.76 : x
  2. Step 2: Convert to fraction form
    3,858.88/5,788.32 = 1,261.76/x
  3. Step 3: Cross multiply
    3,858.88x = 5,788.32 × 1,261.76
  4. Step 4: Simplify right side
    3,858.88x = 7,303,470.64
  5. Step 5: Solve for x
    x = 7,303,470.64/3,858.88
  6. Step 6: Final answer
    x = 1,892.64

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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.