Home / 1,343.36-1,855.74-1,278.56

Finding the Fourth Proportional to 1,343.36, 1,855.74 and 1,278.56

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Solution

The fourth proportional to 1,343.36, 1,855.74 and 1,278.56 is: 1,766.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.36 : 1,855.74 = 1,278.56 : x
  2. Step 2: Convert to fraction form
    1,343.36/1,855.74 = 1,278.56/x
  3. Step 3: Cross multiply
    1,343.36x = 1,855.74 × 1,278.56
  4. Step 4: Simplify right side
    1,343.36x = 2,372,674.93
  5. Step 5: Solve for x
    x = 2,372,674.93/1,343.36
  6. Step 6: Final answer
    x = 1,766.22

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1.5x scale

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.