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Finding the Fourth Proportional to 305,530.40, 421,636.50 and 169,573.11

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Solution

The fourth proportional to 305,530.40, 421,636.50 and 169,573.11 is: 234,013.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,530.40 : 421,636.50 = 169,573.11 : x
  2. Step 2: Convert to fraction form
    305,530.40/421,636.50 = 169,573.11/x
  3. Step 3: Cross multiply
    305,530.40x = 421,636.50 × 169,573.11
  4. Step 4: Simplify right side
    305,530.40x = 71,498,212,594.52
  5. Step 5: Solve for x
    x = 71,498,212,594.52/305,530.40
  6. Step 6: Final answer
    x = 234,013.42

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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.