Home / 1,287,081.84-1,930,874.40-388,596.72

Finding the Fourth Proportional to 1,287,081.84, 1,930,874.40 and 388,596.72

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Solution

The fourth proportional to 1,287,081.84, 1,930,874.40 and 388,596.72 is: 582,971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,081.84 : 1,930,874.40 = 388,596.72 : x
  2. Step 2: Convert to fraction form
    1,287,081.84/1,930,874.40 = 388,596.72/x
  3. Step 3: Cross multiply
    1,287,081.84x = 1,930,874.40 × 388,596.72
  4. Step 4: Simplify right side
    1,287,081.84x = 750,331,458,571.97
  5. Step 5: Solve for x
    x = 750,331,458,571.97/1,287,081.84
  6. Step 6: Final answer
    x = 582,971.06

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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.