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Finding the Fourth Proportional to 305,603.94, 421,712.30 and 169,627.20

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Solution

The fourth proportional to 305,603.94, 421,712.30 and 169,627.20 is: 234,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,603.94 : 421,712.30 = 169,627.20 : x
  2. Step 2: Convert to fraction form
    305,603.94/421,712.30 = 169,627.20/x
  3. Step 3: Cross multiply
    305,603.94x = 421,712.30 × 169,627.20
  4. Step 4: Simplify right side
    305,603.94x = 71,533,876,654.56
  5. Step 5: Solve for x
    x = 71,533,876,654.56/305,603.94
  6. Step 6: Final answer
    x = 234,073.80

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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.