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Finding the Third Proportional to 218,178 and 470,780

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Solution

The third proportional to 218,178 and 470,780 is: 1,015,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,178 : 470,780 = 470,780 : x
  2. Step 2: Convert to fraction form
    218,178/470,780 = 470,780/x
  3. Step 3: Cross multiply
    218,178x = 470,780 × 470,780
  4. Step 4: Simplify right side
    218,178x = 221,633,808,400
  5. Step 5: Solve for x
    x = 221,633,808,400/218,178
  6. Step 6: Final answer
    x = 1,015,839.40

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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.