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Finding the Fourth Proportional to 305,520, 421,620.48 and 171,386.88

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Solution

The fourth proportional to 305,520, 421,620.48 and 171,386.88 is: 236,515.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,520 : 421,620.48 = 171,386.88 : x
  2. Step 2: Convert to fraction form
    305,520/421,620.48 = 171,386.88/x
  3. Step 3: Cross multiply
    305,520x = 421,620.48 × 171,386.88
  4. Step 4: Simplify right side
    305,520x = 72,260,218,611.30
  5. Step 5: Solve for x
    x = 72,260,218,611.30/305,520
  6. Step 6: Final answer
    x = 236,515.51

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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.