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Finding the Fourth Proportional to 305,087.18, 421,020.40 and 169,141.44

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Solution

The fourth proportional to 305,087.18, 421,020.40 and 169,141.44 is: 233,415.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,087.18 : 421,020.40 = 169,141.44 : x
  2. Step 2: Convert to fraction form
    305,087.18/421,020.40 = 169,141.44/x
  3. Step 3: Cross multiply
    305,087.18x = 421,020.40 × 169,141.44
  4. Step 4: Simplify right side
    305,087.18x = 71,211,996,300.80
  5. Step 5: Solve for x
    x = 71,211,996,300.80/305,087.18
  6. Step 6: Final answer
    x = 233,415.23

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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.