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Finding the Fourth Proportional to 305,455.08, 421,530.30 and 169,489.56

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Solution

The fourth proportional to 305,455.08, 421,530.30 and 169,489.56 is: 233,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,455.08 : 421,530.30 = 169,489.56 : x
  2. Step 2: Convert to fraction form
    305,455.08/421,530.30 = 169,489.56/x
  3. Step 3: Cross multiply
    305,455.08x = 421,530.30 × 169,489.56
  4. Step 4: Simplify right side
    305,455.08x = 71,444,985,073.67
  5. Step 5: Solve for x
    x = 71,444,985,073.67/305,455.08
  6. Step 6: Final answer
    x = 233,896.86

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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.