Home / 2,787.66-3,845.61-2,345.40

Finding the Fourth Proportional to 2,787.66, 3,845.61 and 2,345.40

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Solution

The fourth proportional to 2,787.66, 3,845.61 and 2,345.40 is: 3,235.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.66 : 3,845.61 = 2,345.40 : x
  2. Step 2: Convert to fraction form
    2,787.66/3,845.61 = 2,345.40/x
  3. Step 3: Cross multiply
    2,787.66x = 3,845.61 × 2,345.40
  4. Step 4: Simplify right side
    2,787.66x = 9,019,493.69
  5. Step 5: Solve for x
    x = 9,019,493.69/2,787.66
  6. Step 6: Final answer
    x = 3,235.51

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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.