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Finding the Fourth Proportional to 1,821,381.08, 2,731,764.54 and 668,389.22

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Solution

The fourth proportional to 1,821,381.08, 2,731,764.54 and 668,389.22 is: 1,002,471.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821,381.08 : 2,731,764.54 = 668,389.22 : x
  2. Step 2: Convert to fraction form
    1,821,381.08/2,731,764.54 = 668,389.22/x
  3. Step 3: Cross multiply
    1,821,381.08x = 2,731,764.54 × 668,389.22
  4. Step 4: Simplify right side
    1,821,381.08x = 1,825,881,970,114.26
  5. Step 5: Solve for x
    x = 1,825,881,970,114.26/1,821,381.08
  6. Step 6: Final answer
    x = 1,002,471.14

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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.