Home / 820,171.40-1,230,429.90-259,262.60

Finding the Fourth Proportional to 820,171.40, 1,230,429.90 and 259,262.60

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Solution

The fourth proportional to 820,171.40, 1,230,429.90 and 259,262.60 is: 388,948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,171.40 : 1,230,429.90 = 259,262.60 : x
  2. Step 2: Convert to fraction form
    820,171.40/1,230,429.90 = 259,262.60/x
  3. Step 3: Cross multiply
    820,171.40x = 1,230,429.90 × 259,262.60
  4. Step 4: Simplify right side
    820,171.40x = 319,004,454,991.74
  5. Step 5: Solve for x
    x = 319,004,454,991.74/820,171.40
  6. Step 6: Final answer
    x = 388,948.52

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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.