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Finding the Third Proportional to 909,840 and 1,392,576

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Solution

The third proportional to 909,840 and 1,392,576 is: 2,131,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,840 : 1,392,576 = 1,392,576 : x
  2. Step 2: Convert to fraction form
    909,840/1,392,576 = 1,392,576/x
  3. Step 3: Cross multiply
    909,840x = 1,392,576 × 1,392,576
  4. Step 4: Simplify right side
    909,840x = 1,939,267,915,776
  5. Step 5: Solve for x
    x = 1,939,267,915,776/909,840
  6. Step 6: Final answer
    x = 2,131,438.40

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.