Home / 1,938.94-2,907.19-1,280.00

Finding the Fourth Proportional to 1,938.94, 2,907.19 and 1,280.00

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Solution

The fourth proportional to 1,938.94, 2,907.19 and 1,280.00 is: 1,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.94 : 2,907.19 = 1,280.00 : x
  2. Step 2: Convert to fraction form
    1,938.94/2,907.19 = 1,280.00/x
  3. Step 3: Cross multiply
    1,938.94x = 2,907.19 × 1,280.00
  4. Step 4: Simplify right side
    1,938.94x = 3,721,212.07
  5. Step 5: Solve for x
    x = 3,721,212.07/1,938.94
  6. Step 6: Final answer
    x = 1,919.20

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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.