Home / 1,939.61-2,907.33-1,281.95

Finding the Fourth Proportional to 1,939.61, 2,907.33 and 1,281.95

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Solution

The fourth proportional to 1,939.61, 2,907.33 and 1,281.95 is: 1,921.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.61 : 2,907.33 = 1,281.95 : x
  2. Step 2: Convert to fraction form
    1,939.61/2,907.33 = 1,281.95/x
  3. Step 3: Cross multiply
    1,939.61x = 2,907.33 × 1,281.95
  4. Step 4: Simplify right side
    1,939.61x = 3,727,051.69
  5. Step 5: Solve for x
    x = 3,727,051.69/1,939.61
  6. Step 6: Final answer
    x = 1,921.55

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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.