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Finding the Third Proportional to 258,928.50 and 397,416

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Solution

The third proportional to 258,928.50 and 397,416 is: 609,973.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,928.50 : 397,416 = 397,416 : x
  2. Step 2: Convert to fraction form
    258,928.50/397,416 = 397,416/x
  3. Step 3: Cross multiply
    258,928.50x = 397,416 × 397,416
  4. Step 4: Simplify right side
    258,928.50x = 157,939,477,056
  5. Step 5: Solve for x
    x = 157,939,477,056/258,928.50
  6. Step 6: Final answer
    x = 609,973.32

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.