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Finding the Fourth Proportional to 305,310.06, 421,327.98 and 171,174.06

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Solution

The fourth proportional to 305,310.06, 421,327.98 and 171,174.06 is: 236,220.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,310.06 : 421,327.98 = 171,174.06 : x
  2. Step 2: Convert to fraction form
    305,310.06/421,327.98 = 171,174.06/x
  3. Step 3: Cross multiply
    305,310.06x = 421,327.98 × 171,174.06
  4. Step 4: Simplify right side
    305,310.06x = 72,120,420,928.20
  5. Step 5: Solve for x
    x = 72,120,420,928.20/305,310.06
  6. Step 6: Final answer
    x = 236,220.26

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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.