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Finding the Fourth Proportional to 258,353.40, 387,604.22 and 108,516.63

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Solution

The fourth proportional to 258,353.40, 387,604.22 and 108,516.63 is: 162,806.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,353.40 : 387,604.22 = 108,516.63 : x
  2. Step 2: Convert to fraction form
    258,353.40/387,604.22 = 108,516.63/x
  3. Step 3: Cross multiply
    258,353.40x = 387,604.22 × 108,516.63
  4. Step 4: Simplify right side
    258,353.40x = 42,061,503,185.60
  5. Step 5: Solve for x
    x = 42,061,503,185.60/258,353.40
  6. Step 6: Final answer
    x = 162,806.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.