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Finding the Fourth Proportional to 306,486.72, 422,940.96 and 170,516.16

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Solution

The fourth proportional to 306,486.72, 422,940.96 and 170,516.16 is: 235,306.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,486.72 : 422,940.96 = 170,516.16 : x
  2. Step 2: Convert to fraction form
    306,486.72/422,940.96 = 170,516.16/x
  3. Step 3: Cross multiply
    306,486.72x = 422,940.96 × 170,516.16
  4. Step 4: Simplify right side
    306,486.72x = 72,118,268,405.91
  5. Step 5: Solve for x
    x = 72,118,268,405.91/306,486.72
  6. Step 6: Final answer
    x = 235,306.34

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1.5x scale

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.