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Finding the Fourth Proportional to 1,974.08, 2,722.74 and 1,407.08

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Solution

The fourth proportional to 1,974.08, 2,722.74 and 1,407.08 is: 1,940.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.08 : 2,722.74 = 1,407.08 : x
  2. Step 2: Convert to fraction form
    1,974.08/2,722.74 = 1,407.08/x
  3. Step 3: Cross multiply
    1,974.08x = 2,722.74 × 1,407.08
  4. Step 4: Simplify right side
    1,974.08x = 3,831,113.00
  5. Step 5: Solve for x
    x = 3,831,113.00/1,974.08
  6. Step 6: Final answer
    x = 1,940.71

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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.