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Finding the Third Proportional to 120,634 and 257,880

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Solution

The third proportional to 120,634 and 257,880 is: 551,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,634 : 257,880 = 257,880 : x
  2. Step 2: Convert to fraction form
    120,634/257,880 = 257,880/x
  3. Step 3: Cross multiply
    120,634x = 257,880 × 257,880
  4. Step 4: Simplify right side
    120,634x = 66,502,094,400
  5. Step 5: Solve for x
    x = 66,502,094,400/120,634
  6. Step 6: Final answer
    x = 551,271.57

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.