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Finding the Third Proportional to 321,566.63 and 685,840.50

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Solution

The third proportional to 321,566.63 and 685,840.50 is: 1,462,767.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,566.63 : 685,840.50 = 685,840.50 : x
  2. Step 2: Convert to fraction form
    321,566.63/685,840.50 = 685,840.50/x
  3. Step 3: Cross multiply
    321,566.63x = 685,840.50 × 685,840.50
  4. Step 4: Simplify right side
    321,566.63x = 470,377,191,440.25
  5. Step 5: Solve for x
    x = 470,377,191,440.25/321,566.63
  6. Step 6: Final answer
    x = 1,462,767.45

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.