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Finding the Fourth Proportional to 978,109.20, 1,467,163.80 and 659,244.60

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Solution

The fourth proportional to 978,109.20, 1,467,163.80 and 659,244.60 is: 988,866.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,109.20 : 1,467,163.80 = 659,244.60 : x
  2. Step 2: Convert to fraction form
    978,109.20/1,467,163.80 = 659,244.60/x
  3. Step 3: Cross multiply
    978,109.20x = 1,467,163.80 × 659,244.60
  4. Step 4: Simplify right side
    978,109.20x = 967,219,812,465.48
  5. Step 5: Solve for x
    x = 967,219,812,465.48/978,109.20
  6. Step 6: Final answer
    x = 988,866.90

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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.