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Finding the Fourth Proportional to 3,921.58, 5,880.80 and 1,728.75

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Solution

The fourth proportional to 3,921.58, 5,880.80 and 1,728.75 is: 2,592.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.58 : 5,880.80 = 1,728.75 : x
  2. Step 2: Convert to fraction form
    3,921.58/5,880.80 = 1,728.75/x
  3. Step 3: Cross multiply
    3,921.58x = 5,880.80 × 1,728.75
  4. Step 4: Simplify right side
    3,921.58x = 10,166,437.32
  5. Step 5: Solve for x
    x = 10,166,437.32/3,921.58
  6. Step 6: Final answer
    x = 2,592.44

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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.