Home / 2,161.01-2,979.54-1,276.49

Finding the Fourth Proportional to 2,161.01, 2,979.54 and 1,276.49

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Solution

The fourth proportional to 2,161.01, 2,979.54 and 1,276.49 is: 1,759.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.01 : 2,979.54 = 1,276.49 : x
  2. Step 2: Convert to fraction form
    2,161.01/2,979.54 = 1,276.49/x
  3. Step 3: Cross multiply
    2,161.01x = 2,979.54 × 1,276.49
  4. Step 4: Simplify right side
    2,161.01x = 3,803,360.46
  5. Step 5: Solve for x
    x = 3,803,360.46/2,161.01
  6. Step 6: Final answer
    x = 1,759.99

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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.