Home / 820,286.10-1,230,429.15-259,320.60

Finding the Fourth Proportional to 820,286.10, 1,230,429.15 and 259,320.60

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Solution

The fourth proportional to 820,286.10, 1,230,429.15 and 259,320.60 is: 388,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,286.10 : 1,230,429.15 = 259,320.60 : x
  2. Step 2: Convert to fraction form
    820,286.10/1,230,429.15 = 259,320.60/x
  3. Step 3: Cross multiply
    820,286.10x = 1,230,429.15 × 259,320.60
  4. Step 4: Simplify right side
    820,286.10x = 319,075,625,435.49
  5. Step 5: Solve for x
    x = 319,075,625,435.49/820,286.10
  6. Step 6: Final answer
    x = 388,980.90

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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.