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Finding the Fourth Proportional to 306,485.65, 422,942.12 and 170,519.86

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Solution

The fourth proportional to 306,485.65, 422,942.12 and 170,519.86 is: 235,312.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,485.65 : 422,942.12 = 170,519.86 : x
  2. Step 2: Convert to fraction form
    306,485.65/422,942.12 = 170,519.86/x
  3. Step 3: Cross multiply
    306,485.65x = 422,942.12 × 170,519.86
  4. Step 4: Simplify right side
    306,485.65x = 72,120,028,975.79
  5. Step 5: Solve for x
    x = 72,120,028,975.79/306,485.65
  6. Step 6: Final answer
    x = 235,312.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.