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Finding the Fourth Proportional to 431,967.98, 647,968.37 and 165,755.40

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Solution

The fourth proportional to 431,967.98, 647,968.37 and 165,755.40 is: 248,639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,967.98 : 647,968.37 = 165,755.40 : x
  2. Step 2: Convert to fraction form
    431,967.98/647,968.37 = 165,755.40/x
  3. Step 3: Cross multiply
    431,967.98x = 647,968.37 × 165,755.40
  4. Step 4: Simplify right side
    431,967.98x = 107,404,255,527.92
  5. Step 5: Solve for x
    x = 107,404,255,527.92/431,967.98
  6. Step 6: Final answer
    x = 248,639.39

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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.