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Finding the Fourth Proportional to 3,651.60, 5,477.40 and 2,787.60

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Solution

The fourth proportional to 3,651.60, 5,477.40 and 2,787.60 is: 4,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,651.60 : 5,477.40 = 2,787.60 : x
  2. Step 2: Convert to fraction form
    3,651.60/5,477.40 = 2,787.60/x
  3. Step 3: Cross multiply
    3,651.60x = 5,477.40 × 2,787.60
  4. Step 4: Simplify right side
    3,651.60x = 15,268,800.24
  5. Step 5: Solve for x
    x = 15,268,800.24/3,651.60
  6. Step 6: Final answer
    x = 4,181.40

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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.