Home / 809,311.80-1,213,967.70-388,486.20

Finding the Fourth Proportional to 809,311.80, 1,213,967.70 and 388,486.20

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Solution

The fourth proportional to 809,311.80, 1,213,967.70 and 388,486.20 is: 582,729.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,311.80 : 1,213,967.70 = 388,486.20 : x
  2. Step 2: Convert to fraction form
    809,311.80/1,213,967.70 = 388,486.20/x
  3. Step 3: Cross multiply
    809,311.80x = 1,213,967.70 × 388,486.20
  4. Step 4: Simplify right side
    809,311.80x = 471,609,698,695.74
  5. Step 5: Solve for x
    x = 471,609,698,695.74/809,311.80
  6. Step 6: Final answer
    x = 582,729.30

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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.