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Finding the Fourth Proportional to 978,078.80, 1,467,118.20 and 659,214.20

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Solution

The fourth proportional to 978,078.80, 1,467,118.20 and 659,214.20 is: 988,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,078.80 : 1,467,118.20 = 659,214.20 : x
  2. Step 2: Convert to fraction form
    978,078.80/1,467,118.20 = 659,214.20/x
  3. Step 3: Cross multiply
    978,078.80x = 1,467,118.20 × 659,214.20
  4. Step 4: Simplify right side
    978,078.80x = 967,145,150,518.44
  5. Step 5: Solve for x
    x = 967,145,150,518.44/978,078.80
  6. Step 6: Final answer
    x = 988,821.30

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1.5x scale

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.