Home / 1,278.43-1,919.93-1,075.68

Finding the Fourth Proportional to 1,278.43, 1,919.93 and 1,075.68

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Solution

The fourth proportional to 1,278.43, 1,919.93 and 1,075.68 is: 1,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.43 : 1,919.93 = 1,075.68 : x
  2. Step 2: Convert to fraction form
    1,278.43/1,919.93 = 1,075.68/x
  3. Step 3: Cross multiply
    1,278.43x = 1,919.93 × 1,075.68
  4. Step 4: Simplify right side
    1,278.43x = 2,065,224.92
  5. Step 5: Solve for x
    x = 2,065,224.92/1,278.43
  6. Step 6: Final answer
    x = 1,615.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.