Home / 1,917.36-2,645.79-1,078

Finding the Fourth Proportional to 1,917.36, 2,645.79 and 1,078

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Solution

The fourth proportional to 1,917.36, 2,645.79 and 1,078 is: 1,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.36 : 2,645.79 = 1,078 : x
  2. Step 2: Convert to fraction form
    1,917.36/2,645.79 = 1,078/x
  3. Step 3: Cross multiply
    1,917.36x = 2,645.79 × 1,078
  4. Step 4: Simplify right side
    1,917.36x = 2,852,161.62
  5. Step 5: Solve for x
    x = 2,852,161.62/1,917.36
  6. Step 6: Final answer
    x = 1,487.55

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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.