Home / 1,398.36-1,929.78-1,048.44

Finding the Fourth Proportional to 1,398.36, 1,929.78 and 1,048.44

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Solution

The fourth proportional to 1,398.36, 1,929.78 and 1,048.44 is: 1,446.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.36 : 1,929.78 = 1,048.44 : x
  2. Step 2: Convert to fraction form
    1,398.36/1,929.78 = 1,048.44/x
  3. Step 3: Cross multiply
    1,398.36x = 1,929.78 × 1,048.44
  4. Step 4: Simplify right side
    1,398.36x = 2,023,258.54
  5. Step 5: Solve for x
    x = 2,023,258.54/1,398.36
  6. Step 6: Final answer
    x = 1,446.88

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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.