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Finding the Fourth Proportional to 1,907.70, 2,629.49 and 1,278.01

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Solution

The fourth proportional to 1,907.70, 2,629.49 and 1,278.01 is: 1,761.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.70 : 2,629.49 = 1,278.01 : x
  2. Step 2: Convert to fraction form
    1,907.70/2,629.49 = 1,278.01/x
  3. Step 3: Cross multiply
    1,907.70x = 2,629.49 × 1,278.01
  4. Step 4: Simplify right side
    1,907.70x = 3,360,514.51
  5. Step 5: Solve for x
    x = 3,360,514.51/1,907.70
  6. Step 6: Final answer
    x = 1,761.55

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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.