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Finding the Fourth Proportional to 408,430.05, 612,665.16 and 108,913.35

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Solution

The fourth proportional to 408,430.05, 612,665.16 and 108,913.35 is: 163,375.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,430.05 : 612,665.16 = 108,913.35 : x
  2. Step 2: Convert to fraction form
    408,430.05/612,665.16 = 108,913.35/x
  3. Step 3: Cross multiply
    408,430.05x = 612,665.16 × 108,913.35
  4. Step 4: Simplify right side
    408,430.05x = 66,727,415,003.89
  5. Step 5: Solve for x
    x = 66,727,415,003.89/408,430.05
  6. Step 6: Final answer
    x = 163,375.38

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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.