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Finding the Fourth Proportional to 987,355.80, 1,481,033.70 and 871,234.20

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Solution

The fourth proportional to 987,355.80, 1,481,033.70 and 871,234.20 is: 1,306,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,355.80 : 1,481,033.70 = 871,234.20 : x
  2. Step 2: Convert to fraction form
    987,355.80/1,481,033.70 = 871,234.20/x
  3. Step 3: Cross multiply
    987,355.80x = 1,481,033.70 × 871,234.20
  4. Step 4: Simplify right side
    987,355.80x = 1,290,327,210,792.54
  5. Step 5: Solve for x
    x = 1,290,327,210,792.54/987,355.80
  6. Step 6: Final answer
    x = 1,306,851.30

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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.