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Finding the Fourth Proportional to 206,597.20, 309,895.80 and 171,605.20

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Solution

The fourth proportional to 206,597.20, 309,895.80 and 171,605.20 is: 257,407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,597.20 : 309,895.80 = 171,605.20 : x
  2. Step 2: Convert to fraction form
    206,597.20/309,895.80 = 171,605.20/x
  3. Step 3: Cross multiply
    206,597.20x = 309,895.80 × 171,605.20
  4. Step 4: Simplify right side
    206,597.20x = 53,179,730,738.16
  5. Step 5: Solve for x
    x = 53,179,730,738.16/206,597.20
  6. Step 6: Final answer
    x = 257,407.80

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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.