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Finding the Fourth Proportional to 1,993,090, 2,989,635 and 646,379.14

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Solution

The fourth proportional to 1,993,090, 2,989,635 and 646,379.14 is: 969,568.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,090 : 2,989,635 = 646,379.14 : x
  2. Step 2: Convert to fraction form
    1,993,090/2,989,635 = 646,379.14/x
  3. Step 3: Cross multiply
    1,993,090x = 2,989,635 × 646,379.14
  4. Step 4: Simplify right side
    1,993,090x = 1,932,437,700,213.90
  5. Step 5: Solve for x
    x = 1,932,437,700,213.90/1,993,090
  6. Step 6: Final answer
    x = 969,568.71

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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.