Home / 1,940.85-2,678.40-1,056.65

Finding the Fourth Proportional to 1,940.85, 2,678.40 and 1,056.65

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Solution

The fourth proportional to 1,940.85, 2,678.40 and 1,056.65 is: 1,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.85 : 2,678.40 = 1,056.65 : x
  2. Step 2: Convert to fraction form
    1,940.85/2,678.40 = 1,056.65/x
  3. Step 3: Cross multiply
    1,940.85x = 2,678.40 × 1,056.65
  4. Step 4: Simplify right side
    1,940.85x = 2,830,131.36
  5. Step 5: Solve for x
    x = 2,830,131.36/1,940.85
  6. Step 6: Final answer
    x = 1,458.20

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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.