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Finding the Fourth Proportional to 612,699.72, 919,093.26 and 163,418.04

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Solution

The fourth proportional to 612,699.72, 919,093.26 and 163,418.04 is: 245,138.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,699.72 : 919,093.26 = 163,418.04 : x
  2. Step 2: Convert to fraction form
    612,699.72/919,093.26 = 163,418.04/x
  3. Step 3: Cross multiply
    612,699.72x = 919,093.26 × 163,418.04
  4. Step 4: Simplify right side
    612,699.72x = 150,196,419,126.41
  5. Step 5: Solve for x
    x = 150,196,419,126.41/612,699.72
  6. Step 6: Final answer
    x = 245,138.71

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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.