Home / 1,942.28-2,678.32-1,278.28

Finding the Fourth Proportional to 1,942.28, 2,678.32 and 1,278.28

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Solution

The fourth proportional to 1,942.28, 2,678.32 and 1,278.28 is: 1,762.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.28 : 2,678.32 = 1,278.28 : x
  2. Step 2: Convert to fraction form
    1,942.28/2,678.32 = 1,278.28/x
  3. Step 3: Cross multiply
    1,942.28x = 2,678.32 × 1,278.28
  4. Step 4: Simplify right side
    1,942.28x = 3,423,640.65
  5. Step 5: Solve for x
    x = 3,423,640.65/1,942.28
  6. Step 6: Final answer
    x = 1,762.69

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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.