Home / 2,078.63-2,867.12-1,331.40

Finding the Fourth Proportional to 2,078.63, 2,867.12 and 1,331.40

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Solution

The fourth proportional to 2,078.63, 2,867.12 and 1,331.40 is: 1,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.63 : 2,867.12 = 1,331.40 : x
  2. Step 2: Convert to fraction form
    2,078.63/2,867.12 = 1,331.40/x
  3. Step 3: Cross multiply
    2,078.63x = 2,867.12 × 1,331.40
  4. Step 4: Simplify right side
    2,078.63x = 3,817,283.57
  5. Step 5: Solve for x
    x = 3,817,283.57/2,078.63
  6. Step 6: Final answer
    x = 1,836.45

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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.