Home / 2,160.68-2,981.40-1,276.16

Finding the Fourth Proportional to 2,160.68, 2,981.40 and 1,276.16

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Solution

The fourth proportional to 2,160.68, 2,981.40 and 1,276.16 is: 1,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.68 : 2,981.40 = 1,276.16 : x
  2. Step 2: Convert to fraction form
    2,160.68/2,981.40 = 1,276.16/x
  3. Step 3: Cross multiply
    2,160.68x = 2,981.40 × 1,276.16
  4. Step 4: Simplify right side
    2,160.68x = 3,804,743.42
  5. Step 5: Solve for x
    x = 3,804,743.42/2,160.68
  6. Step 6: Final answer
    x = 1,760.90

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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.