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Finding the Fourth Proportional to 978,179.80, 1,467,269.70 and 659,315.20

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Solution

The fourth proportional to 978,179.80, 1,467,269.70 and 659,315.20 is: 988,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,179.80 : 1,467,269.70 = 659,315.20 : x
  2. Step 2: Convert to fraction form
    978,179.80/1,467,269.70 = 659,315.20/x
  3. Step 3: Cross multiply
    978,179.80x = 1,467,269.70 × 659,315.20
  4. Step 4: Simplify right side
    978,179.80x = 967,393,215,709.44
  5. Step 5: Solve for x
    x = 967,393,215,709.44/978,179.80
  6. Step 6: Final answer
    x = 988,972.80

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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.