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Finding the Third Proportional to 218,979 and 470,692.50

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Solution

The third proportional to 218,979 and 470,692.50 is: 1,011,747.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,979 : 470,692.50 = 470,692.50 : x
  2. Step 2: Convert to fraction form
    218,979/470,692.50 = 470,692.50/x
  3. Step 3: Cross multiply
    218,979x = 470,692.50 × 470,692.50
  4. Step 4: Simplify right side
    218,979x = 221,551,429,556.25
  5. Step 5: Solve for x
    x = 221,551,429,556.25/218,979
  6. Step 6: Final answer
    x = 1,011,747.38

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.