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Finding the Fourth Proportional to 1,215,261.60, 1,822,017.60 and 682,945.80

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Solution

The fourth proportional to 1,215,261.60, 1,822,017.60 and 682,945.80 is: 1,023,927.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,261.60 : 1,822,017.60 = 682,945.80 : x
  2. Step 2: Convert to fraction form
    1,215,261.60/1,822,017.60 = 682,945.80/x
  3. Step 3: Cross multiply
    1,215,261.60x = 1,822,017.60 × 682,945.80
  4. Step 4: Simplify right side
    1,215,261.60x = 1,244,339,267,446.08
  5. Step 5: Solve for x
    x = 1,244,339,267,446.08/1,215,261.60
  6. Step 6: Final answer
    x = 1,023,927.08

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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.