Home / 2,911.95-4,362.19-1,921.74

Finding the Fourth Proportional to 2,911.95, 4,362.19 and 1,921.74

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Solution

The fourth proportional to 2,911.95, 4,362.19 and 1,921.74 is: 2,878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.95 : 4,362.19 = 1,921.74 : x
  2. Step 2: Convert to fraction form
    2,911.95/4,362.19 = 1,921.74/x
  3. Step 3: Cross multiply
    2,911.95x = 4,362.19 × 1,921.74
  4. Step 4: Simplify right side
    2,911.95x = 8,382,995.01
  5. Step 5: Solve for x
    x = 8,382,995.01/2,911.95
  6. Step 6: Final answer
    x = 2,878.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.