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Finding the Third Proportional to 209,153.25 and 429,430.50

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Solution

The third proportional to 209,153.25 and 429,430.50 is: 881,700.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,153.25 : 429,430.50 = 429,430.50 : x
  2. Step 2: Convert to fraction form
    209,153.25/429,430.50 = 429,430.50/x
  3. Step 3: Cross multiply
    209,153.25x = 429,430.50 × 429,430.50
  4. Step 4: Simplify right side
    209,153.25x = 184,410,554,330.25
  5. Step 5: Solve for x
    x = 184,410,554,330.25/209,153.25
  6. Step 6: Final answer
    x = 881,700.64

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.