Home / 2,160.28-2,980.65-1,276.12

Finding the Fourth Proportional to 2,160.28, 2,980.65 and 1,276.12

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Solution

The fourth proportional to 2,160.28, 2,980.65 and 1,276.12 is: 1,760.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.28 : 2,980.65 = 1,276.12 : x
  2. Step 2: Convert to fraction form
    2,160.28/2,980.65 = 1,276.12/x
  3. Step 3: Cross multiply
    2,160.28x = 2,980.65 × 1,276.12
  4. Step 4: Simplify right side
    2,160.28x = 3,803,667.08
  5. Step 5: Solve for x
    x = 3,803,667.08/2,160.28
  6. Step 6: Final answer
    x = 1,760.73

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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.