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Finding the Fourth Proportional to 408,586.08, 612,877.08 and 104,979.90

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Solution

The fourth proportional to 408,586.08, 612,877.08 and 104,979.90 is: 157,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,586.08 : 612,877.08 = 104,979.90 : x
  2. Step 2: Convert to fraction form
    408,586.08/612,877.08 = 104,979.90/x
  3. Step 3: Cross multiply
    408,586.08x = 612,877.08 × 104,979.90
  4. Step 4: Simplify right side
    408,586.08x = 64,339,774,570.69
  5. Step 5: Solve for x
    x = 64,339,774,570.69/408,586.08
  6. Step 6: Final answer
    x = 157,469.33

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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.