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Finding the Third Proportional to 203,430 and 314,991

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Solution

The third proportional to 203,430 and 314,991 is: 487,732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,430 : 314,991 = 314,991 : x
  2. Step 2: Convert to fraction form
    203,430/314,991 = 314,991/x
  3. Step 3: Cross multiply
    203,430x = 314,991 × 314,991
  4. Step 4: Simplify right side
    203,430x = 99,219,330,081
  5. Step 5: Solve for x
    x = 99,219,330,081/203,430
  6. Step 6: Final answer
    x = 487,732.05

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.