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Finding the Fourth Proportional to 1,321,362, 1,982,043 and 324,090

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Solution

The fourth proportional to 1,321,362, 1,982,043 and 324,090 is: 486,135

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,362 : 1,982,043 = 324,090 : x
  2. Step 2: Convert to fraction form
    1,321,362/1,982,043 = 324,090/x
  3. Step 3: Cross multiply
    1,321,362x = 1,982,043 × 324,090
  4. Step 4: Simplify right side
    1,321,362x = 642,360,315,870
  5. Step 5: Solve for x
    x = 642,360,315,870/1,321,362
  6. Step 6: Final answer
    x = 486,135

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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.