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Finding the Fourth Proportional to 1,975.88, 2,726.75 and 1,278.47

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Solution

The fourth proportional to 1,975.88, 2,726.75 and 1,278.47 is: 1,764.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.88 : 2,726.75 = 1,278.47 : x
  2. Step 2: Convert to fraction form
    1,975.88/2,726.75 = 1,278.47/x
  3. Step 3: Cross multiply
    1,975.88x = 2,726.75 × 1,278.47
  4. Step 4: Simplify right side
    1,975.88x = 3,486,048.05
  5. Step 5: Solve for x
    x = 3,486,048.05/1,975.88
  6. Step 6: Final answer
    x = 1,764.31

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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.