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Finding the Third Proportional to 656,857 and 989,985

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Solution

The third proportional to 656,857 and 989,985 is: 1,492,060.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,857 : 989,985 = 989,985 : x
  2. Step 2: Convert to fraction form
    656,857/989,985 = 989,985/x
  3. Step 3: Cross multiply
    656,857x = 989,985 × 989,985
  4. Step 4: Simplify right side
    656,857x = 980,070,300,225
  5. Step 5: Solve for x
    x = 980,070,300,225/656,857
  6. Step 6: Final answer
    x = 1,492,060.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.