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Finding the Fourth Proportional to 2,787.60, 4,181.40 and 735.60

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Solution

The fourth proportional to 2,787.60, 4,181.40 and 735.60 is: 1,103.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.60 : 4,181.40 = 735.60 : x
  2. Step 2: Convert to fraction form
    2,787.60/4,181.40 = 735.60/x
  3. Step 3: Cross multiply
    2,787.60x = 4,181.40 × 735.60
  4. Step 4: Simplify right side
    2,787.60x = 3,075,837.84
  5. Step 5: Solve for x
    x = 3,075,837.84/2,787.60
  6. Step 6: Final answer
    x = 1,103.40

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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.