Home / 780,163.85-1,170,511.63-420,371.60

Finding the Fourth Proportional to 780,163.85, 1,170,511.63 and 420,371.60

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Solution

The fourth proportional to 780,163.85, 1,170,511.63 and 420,371.60 is: 630,700.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,163.85 : 1,170,511.63 = 420,371.60 : x
  2. Step 2: Convert to fraction form
    780,163.85/1,170,511.63 = 420,371.60/x
  3. Step 3: Cross multiply
    780,163.85x = 1,170,511.63 × 420,371.60
  4. Step 4: Simplify right side
    780,163.85x = 492,049,839,818.22
  5. Step 5: Solve for x
    x = 492,049,839,818.22/780,163.85
  6. Step 6: Final answer
    x = 630,700.64

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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.