Home / 1,921.70-2,885.14-1,229.72

Finding the Fourth Proportional to 1,921.70, 2,885.14 and 1,229.72

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Solution

The fourth proportional to 1,921.70, 2,885.14 and 1,229.72 is: 1,846.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.70 : 2,885.14 = 1,229.72 : x
  2. Step 2: Convert to fraction form
    1,921.70/2,885.14 = 1,229.72/x
  3. Step 3: Cross multiply
    1,921.70x = 2,885.14 × 1,229.72
  4. Step 4: Simplify right side
    1,921.70x = 3,547,917.44
  5. Step 5: Solve for x
    x = 3,547,917.44/1,921.70
  6. Step 6: Final answer
    x = 1,846.24

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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.