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Finding the Third Proportional to 155,261.25 and 219,739.50

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Solution

The third proportional to 155,261.25 and 219,739.50 is: 310,994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,261.25 : 219,739.50 = 219,739.50 : x
  2. Step 2: Convert to fraction form
    155,261.25/219,739.50 = 219,739.50/x
  3. Step 3: Cross multiply
    155,261.25x = 219,739.50 × 219,739.50
  4. Step 4: Simplify right side
    155,261.25x = 48,285,447,860.25
  5. Step 5: Solve for x
    x = 48,285,447,860.25/155,261.25
  6. Step 6: Final answer
    x = 310,994.84

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.