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Finding the Fourth Proportional to 305,798.52, 421,987.59 and 169,841.25

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Solution

The fourth proportional to 305,798.52, 421,987.59 and 169,841.25 is: 234,372.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,798.52 : 421,987.59 = 169,841.25 : x
  2. Step 2: Convert to fraction form
    305,798.52/421,987.59 = 169,841.25/x
  3. Step 3: Cross multiply
    305,798.52x = 421,987.59 × 169,841.25
  4. Step 4: Simplify right side
    305,798.52x = 71,670,899,770.09
  5. Step 5: Solve for x
    x = 71,670,899,770.09/305,798.52
  6. Step 6: Final answer
    x = 234,372.95

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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.