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Finding the Fourth Proportional to 1,906, 2,630.64 and 1,120.48

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Solution

The fourth proportional to 1,906, 2,630.64 and 1,120.48 is: 1,546.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906 : 2,630.64 = 1,120.48 : x
  2. Step 2: Convert to fraction form
    1,906/2,630.64 = 1,120.48/x
  3. Step 3: Cross multiply
    1,906x = 2,630.64 × 1,120.48
  4. Step 4: Simplify right side
    1,906x = 2,947,579.51
  5. Step 5: Solve for x
    x = 2,947,579.51/1,906
  6. Step 6: Final answer
    x = 1,546.47

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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.