Home / 820,422.40-1,230,633.60-259,628.80

Finding the Fourth Proportional to 820,422.40, 1,230,633.60 and 259,628.80

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Solution

The fourth proportional to 820,422.40, 1,230,633.60 and 259,628.80 is: 389,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,422.40 : 1,230,633.60 = 259,628.80 : x
  2. Step 2: Convert to fraction form
    820,422.40/1,230,633.60 = 259,628.80/x
  3. Step 3: Cross multiply
    820,422.40x = 1,230,633.60 × 259,628.80
  4. Step 4: Simplify right side
    820,422.40x = 319,507,924,807.68
  5. Step 5: Solve for x
    x = 319,507,924,807.68/820,422.40
  6. Step 6: Final answer
    x = 389,443.20

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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.