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Finding the Fourth Proportional to 408,038.25, 612,056.14 and 108,518.58

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Solution

The fourth proportional to 408,038.25, 612,056.14 and 108,518.58 is: 162,777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,038.25 : 612,056.14 = 108,518.58 : x
  2. Step 2: Convert to fraction form
    408,038.25/612,056.14 = 108,518.58/x
  3. Step 3: Cross multiply
    408,038.25x = 612,056.14 × 108,518.58
  4. Step 4: Simplify right side
    408,038.25x = 66,419,463,193.08
  5. Step 5: Solve for x
    x = 66,419,463,193.08/408,038.25
  6. Step 6: Final answer
    x = 162,777.54

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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.