Home / 1,278.87-1,908.97-1,097.43

Finding the Fourth Proportional to 1,278.87, 1,908.97 and 1,097.43

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Solution

The fourth proportional to 1,278.87, 1,908.97 and 1,097.43 is: 1,638.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.87 : 1,908.97 = 1,097.43 : x
  2. Step 2: Convert to fraction form
    1,278.87/1,908.97 = 1,097.43/x
  3. Step 3: Cross multiply
    1,278.87x = 1,908.97 × 1,097.43
  4. Step 4: Simplify right side
    1,278.87x = 2,094,968.46
  5. Step 5: Solve for x
    x = 2,094,968.46/1,278.87
  6. Step 6: Final answer
    x = 1,638.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.