Home / 2,160.92-2,980.68-1,276.67

Finding the Fourth Proportional to 2,160.92, 2,980.68 and 1,276.67

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Solution

The fourth proportional to 2,160.92, 2,980.68 and 1,276.67 is: 1,760.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.92 : 2,980.68 = 1,276.67 : x
  2. Step 2: Convert to fraction form
    2,160.92/2,980.68 = 1,276.67/x
  3. Step 3: Cross multiply
    2,160.92x = 2,980.68 × 1,276.67
  4. Step 4: Simplify right side
    2,160.92x = 3,805,344.74
  5. Step 5: Solve for x
    x = 3,805,344.74/2,160.92
  6. Step 6: Final answer
    x = 1,760.98

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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.