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Finding the Third Proportional to 457,215 and 989,604

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Solution

The third proportional to 457,215 and 989,604 is: 2,141,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,215 : 989,604 = 989,604 : x
  2. Step 2: Convert to fraction form
    457,215/989,604 = 989,604/x
  3. Step 3: Cross multiply
    457,215x = 989,604 × 989,604
  4. Step 4: Simplify right side
    457,215x = 979,316,076,816
  5. Step 5: Solve for x
    x = 979,316,076,816/457,215
  6. Step 6: Final answer
    x = 2,141,915.90

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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.