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Finding the Fourth Proportional to 2,738, 4,109.24 and 1,917.92

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Solution

The fourth proportional to 2,738, 4,109.24 and 1,917.92 is: 2,878.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738 : 4,109.24 = 1,917.92 : x
  2. Step 2: Convert to fraction form
    2,738/4,109.24 = 1,917.92/x
  3. Step 3: Cross multiply
    2,738x = 4,109.24 × 1,917.92
  4. Step 4: Simplify right side
    2,738x = 7,881,193.58
  5. Step 5: Solve for x
    x = 7,881,193.58/2,738
  6. Step 6: Final answer
    x = 2,878.45

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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.