Home / 820,494.72-1,230,786.88-259,487.36

Finding the Fourth Proportional to 820,494.72, 1,230,786.88 and 259,487.36

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Solution

The fourth proportional to 820,494.72, 1,230,786.88 and 259,487.36 is: 389,245.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,494.72 : 1,230,786.88 = 259,487.36 : x
  2. Step 2: Convert to fraction form
    820,494.72/1,230,786.88 = 259,487.36/x
  3. Step 3: Cross multiply
    820,494.72x = 1,230,786.88 × 259,487.36
  4. Step 4: Simplify right side
    820,494.72x = 319,373,638,213.84
  5. Step 5: Solve for x
    x = 319,373,638,213.84/820,494.72
  6. Step 6: Final answer
    x = 389,245.21

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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.