Home / 2,867.40-3,983.58-2,840.40

Finding the Fourth Proportional to 2,867.40, 3,983.58 and 2,840.40

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Solution

The fourth proportional to 2,867.40, 3,983.58 and 2,840.40 is: 3,946.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.40 : 3,983.58 = 2,840.40 : x
  2. Step 2: Convert to fraction form
    2,867.40/3,983.58 = 2,840.40/x
  3. Step 3: Cross multiply
    2,867.40x = 3,983.58 × 2,840.40
  4. Step 4: Simplify right side
    2,867.40x = 11,314,960.63
  5. Step 5: Solve for x
    x = 11,314,960.63/2,867.40
  6. Step 6: Final answer
    x = 3,946.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.