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Finding the Third Proportional to 319,178 and 485,400

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Solution

The third proportional to 319,178 and 485,400 is: 738,187.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,178 : 485,400 = 485,400 : x
  2. Step 2: Convert to fraction form
    319,178/485,400 = 485,400/x
  3. Step 3: Cross multiply
    319,178x = 485,400 × 485,400
  4. Step 4: Simplify right side
    319,178x = 235,613,160,000
  5. Step 5: Solve for x
    x = 235,613,160,000/319,178
  6. Step 6: Final answer
    x = 738,187.34

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.