Home / 809,311.20-1,213,966.80-659,720.40

Finding the Fourth Proportional to 809,311.20, 1,213,966.80 and 659,720.40

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Solution

The fourth proportional to 809,311.20, 1,213,966.80 and 659,720.40 is: 989,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,311.20 : 1,213,966.80 = 659,720.40 : x
  2. Step 2: Convert to fraction form
    809,311.20/1,213,966.80 = 659,720.40/x
  3. Step 3: Cross multiply
    809,311.20x = 1,213,966.80 × 659,720.40
  4. Step 4: Simplify right side
    809,311.20x = 800,878,662,882.72
  5. Step 5: Solve for x
    x = 800,878,662,882.72/809,311.20
  6. Step 6: Final answer
    x = 989,580.60

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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.