Home / 2,160.40-2,981.16-1,276.20

Finding the Fourth Proportional to 2,160.40, 2,981.16 and 1,276.20

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Solution

The fourth proportional to 2,160.40, 2,981.16 and 1,276.20 is: 1,761.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.40 : 2,981.16 = 1,276.20 : x
  2. Step 2: Convert to fraction form
    2,160.40/2,981.16 = 1,276.20/x
  3. Step 3: Cross multiply
    2,160.40x = 2,981.16 × 1,276.20
  4. Step 4: Simplify right side
    2,160.40x = 3,804,556.39
  5. Step 5: Solve for x
    x = 3,804,556.39/2,160.40
  6. Step 6: Final answer
    x = 1,761.04

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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.