Home / 1,948.72-2,921.64-1,678

Finding the Fourth Proportional to 1,948.72, 2,921.64 and 1,678

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Solution

The fourth proportional to 1,948.72, 2,921.64 and 1,678 is: 2,515.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.72 : 2,921.64 = 1,678 : x
  2. Step 2: Convert to fraction form
    1,948.72/2,921.64 = 1,678/x
  3. Step 3: Cross multiply
    1,948.72x = 2,921.64 × 1,678
  4. Step 4: Simplify right side
    1,948.72x = 4,902,511.92
  5. Step 5: Solve for x
    x = 4,902,511.92/1,948.72
  6. Step 6: Final answer
    x = 2,515.76

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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.