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Finding the Fourth Proportional to 1,368,396.89, 1,888,382.97 and 764,784.89

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Solution

The fourth proportional to 1,368,396.89, 1,888,382.97 and 764,784.89 is: 1,055,400.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,396.89 : 1,888,382.97 = 764,784.89 : x
  2. Step 2: Convert to fraction form
    1,368,396.89/1,888,382.97 = 764,784.89/x
  3. Step 3: Cross multiply
    1,368,396.89x = 1,888,382.97 × 764,784.89
  4. Step 4: Simplify right side
    1,368,396.89x = 1,444,206,761,989.32
  5. Step 5: Solve for x
    x = 1,444,206,761,989.32/1,368,396.89
  6. Step 6: Final answer
    x = 1,055,400.50

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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.