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Finding the Fourth Proportional to 978,450.90, 1,467,676.35 and 820,986.90

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Solution

The fourth proportional to 978,450.90, 1,467,676.35 and 820,986.90 is: 1,231,480.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,450.90 : 1,467,676.35 = 820,986.90 : x
  2. Step 2: Convert to fraction form
    978,450.90/1,467,676.35 = 820,986.90/x
  3. Step 3: Cross multiply
    978,450.90x = 1,467,676.35 × 820,986.90
  4. Step 4: Simplify right side
    978,450.90x = 1,204,943,056,789.82
  5. Step 5: Solve for x
    x = 1,204,943,056,789.82/978,450.90
  6. Step 6: Final answer
    x = 1,231,480.35

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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.