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Finding the Fourth Proportional to 1,057,628.02, 1,583,419.11 and 990,589.18

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Solution

The fourth proportional to 1,057,628.02, 1,583,419.11 and 990,589.18 is: 1,483,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057,628.02 : 1,583,419.11 = 990,589.18 : x
  2. Step 2: Convert to fraction form
    1,057,628.02/1,583,419.11 = 990,589.18/x
  3. Step 3: Cross multiply
    1,057,628.02x = 1,583,419.11 × 990,589.18
  4. Step 4: Simplify right side
    1,057,628.02x = 1,568,517,837,771.23
  5. Step 5: Solve for x
    x = 1,568,517,837,771.23/1,057,628.02
  6. Step 6: Final answer
    x = 1,483,052.46

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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.