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Finding the Fourth Proportional to 1,986,998.40, 2,978,456.40 and 974,563.20

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Solution

The fourth proportional to 1,986,998.40, 2,978,456.40 and 974,563.20 is: 1,460,843.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,998.40 : 2,978,456.40 = 974,563.20 : x
  2. Step 2: Convert to fraction form
    1,986,998.40/2,978,456.40 = 974,563.20/x
  3. Step 3: Cross multiply
    1,986,998.40x = 2,978,456.40 × 974,563.20
  4. Step 4: Simplify right side
    1,986,998.40x = 2,902,694,000,244.48
  5. Step 5: Solve for x
    x = 2,902,694,000,244.48/1,986,998.40
  6. Step 6: Final answer
    x = 1,460,843.65

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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.