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Finding the Third Proportional to 421,142 and 921,014

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Solution

The third proportional to 421,142 and 921,014 is: 2,014,206.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,142 : 921,014 = 921,014 : x
  2. Step 2: Convert to fraction form
    421,142/921,014 = 921,014/x
  3. Step 3: Cross multiply
    421,142x = 921,014 × 921,014
  4. Step 4: Simplify right side
    421,142x = 848,266,788,196
  5. Step 5: Solve for x
    x = 848,266,788,196/421,142
  6. Step 6: Final answer
    x = 2,014,206.11

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.