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Finding the Fourth Proportional to 978,138.20, 1,467,207.30 and 659,273.60

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Solution

The fourth proportional to 978,138.20, 1,467,207.30 and 659,273.60 is: 988,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,138.20 : 1,467,207.30 = 659,273.60 : x
  2. Step 2: Convert to fraction form
    978,138.20/1,467,207.30 = 659,273.60/x
  3. Step 3: Cross multiply
    978,138.20x = 1,467,207.30 × 659,273.60
  4. Step 4: Simplify right side
    978,138.20x = 967,291,038,617.28
  5. Step 5: Solve for x
    x = 967,291,038,617.28/978,138.20
  6. Step 6: Final answer
    x = 988,910.40

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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.