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Finding the Fourth Proportional to 1,376,492.67, 1,899,863.49 and 764,855.60

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Solution

The fourth proportional to 1,376,492.67, 1,899,863.49 and 764,855.60 is: 1,055,669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376,492.67 : 1,899,863.49 = 764,855.60 : x
  2. Step 2: Convert to fraction form
    1,376,492.67/1,899,863.49 = 764,855.60/x
  3. Step 3: Cross multiply
    1,376,492.67x = 1,899,863.49 × 764,855.60
  4. Step 4: Simplify right side
    1,376,492.67x = 1,453,121,229,562.04
  5. Step 5: Solve for x
    x = 1,453,121,229,562.04/1,376,492.67
  6. Step 6: Final answer
    x = 1,055,669.43

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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.