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Finding the Third Proportional to 218,109.75 and 470,590.50

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Solution

The third proportional to 218,109.75 and 470,590.50 is: 1,015,339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,109.75 : 470,590.50 = 470,590.50 : x
  2. Step 2: Convert to fraction form
    218,109.75/470,590.50 = 470,590.50/x
  3. Step 3: Cross multiply
    218,109.75x = 470,590.50 × 470,590.50
  4. Step 4: Simplify right side
    218,109.75x = 221,455,418,690.25
  5. Step 5: Solve for x
    x = 221,455,418,690.25/218,109.75
  6. Step 6: Final answer
    x = 1,015,339.38

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.