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Finding the Fourth Proportional to 1,974.81, 2,722.08 and 1,345.12

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Solution

The fourth proportional to 1,974.81, 2,722.08 and 1,345.12 is: 1,854.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.81 : 2,722.08 = 1,345.12 : x
  2. Step 2: Convert to fraction form
    1,974.81/2,722.08 = 1,345.12/x
  3. Step 3: Cross multiply
    1,974.81x = 2,722.08 × 1,345.12
  4. Step 4: Simplify right side
    1,974.81x = 3,661,524.25
  5. Step 5: Solve for x
    x = 3,661,524.25/1,974.81
  6. Step 6: Final answer
    x = 1,854.11

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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.