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Finding the Fourth Proportional to 305,319.08, 421,390.78 and 169,396.82

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Solution

The fourth proportional to 305,319.08, 421,390.78 and 169,396.82 is: 233,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,319.08 : 421,390.78 = 169,396.82 : x
  2. Step 2: Convert to fraction form
    305,319.08/421,390.78 = 169,396.82/x
  3. Step 3: Cross multiply
    305,319.08x = 421,390.78 × 169,396.82
  4. Step 4: Simplify right side
    305,319.08x = 71,382,258,109.32
  5. Step 5: Solve for x
    x = 71,382,258,109.32/305,319.08
  6. Step 6: Final answer
    x = 233,795.60

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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.