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Finding the Fourth Proportional to 978,200.70, 1,467,301.05 and 820,736.70

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Solution

The fourth proportional to 978,200.70, 1,467,301.05 and 820,736.70 is: 1,231,105.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,200.70 : 1,467,301.05 = 820,736.70 : x
  2. Step 2: Convert to fraction form
    978,200.70/1,467,301.05 = 820,736.70/x
  3. Step 3: Cross multiply
    978,200.70x = 1,467,301.05 × 820,736.70
  4. Step 4: Simplify right side
    978,200.70x = 1,204,267,821,683.53
  5. Step 5: Solve for x
    x = 1,204,267,821,683.53/978,200.70
  6. Step 6: Final answer
    x = 1,231,105.05

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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.