Home / 820,420.80-1,230,623.10-259,455.30

Finding the Fourth Proportional to 820,420.80, 1,230,623.10 and 259,455.30

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Solution

The fourth proportional to 820,420.80, 1,230,623.10 and 259,455.30 is: 389,180.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,420.80 : 1,230,623.10 = 259,455.30 : x
  2. Step 2: Convert to fraction form
    820,420.80/1,230,623.10 = 259,455.30/x
  3. Step 3: Cross multiply
    820,420.80x = 1,230,623.10 × 259,455.30
  4. Step 4: Simplify right side
    820,420.80x = 319,291,685,597.43
  5. Step 5: Solve for x
    x = 319,291,685,597.43/820,420.80
  6. Step 6: Final answer
    x = 389,180.39

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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.