Home / 2,787.20-3,845.84-1,607.84

Finding the Fourth Proportional to 2,787.20, 3,845.84 and 1,607.84

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Solution

The fourth proportional to 2,787.20, 3,845.84 and 1,607.84 is: 2,218.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.20 : 3,845.84 = 1,607.84 : x
  2. Step 2: Convert to fraction form
    2,787.20/3,845.84 = 1,607.84/x
  3. Step 3: Cross multiply
    2,787.20x = 3,845.84 × 1,607.84
  4. Step 4: Simplify right side
    2,787.20x = 6,183,495.39
  5. Step 5: Solve for x
    x = 6,183,495.39/2,787.20
  6. Step 6: Final answer
    x = 2,218.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.