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Finding the Fourth Proportional to 408,379.42, 612,598.32 and 108,858.46

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Solution

The fourth proportional to 408,379.42, 612,598.32 and 108,858.46 is: 163,295.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,379.42 : 612,598.32 = 108,858.46 : x
  2. Step 2: Convert to fraction form
    408,379.42/612,598.32 = 108,858.46/x
  3. Step 3: Cross multiply
    408,379.42x = 612,598.32 × 108,858.46
  4. Step 4: Simplify right side
    408,379.42x = 66,686,509,713.79
  5. Step 5: Solve for x
    x = 66,686,509,713.79/408,379.42
  6. Step 6: Final answer
    x = 163,295.47

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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.