Home / 1,979.08-2,730.98-1,222.74

Finding the Fourth Proportional to 1,979.08, 2,730.98 and 1,222.74

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Solution

The fourth proportional to 1,979.08, 2,730.98 and 1,222.74 is: 1,687.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.08 : 2,730.98 = 1,222.74 : x
  2. Step 2: Convert to fraction form
    1,979.08/2,730.98 = 1,222.74/x
  3. Step 3: Cross multiply
    1,979.08x = 2,730.98 × 1,222.74
  4. Step 4: Simplify right side
    1,979.08x = 3,339,278.49
  5. Step 5: Solve for x
    x = 3,339,278.49/1,979.08
  6. Step 6: Final answer
    x = 1,687.29

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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.