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Finding the Third Proportional to 30,447 and 65,430

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Solution

The third proportional to 30,447 and 65,430 is: 140,607.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,447 : 65,430 = 65,430 : x
  2. Step 2: Convert to fraction form
    30,447/65,430 = 65,430/x
  3. Step 3: Cross multiply
    30,447x = 65,430 × 65,430
  4. Step 4: Simplify right side
    30,447x = 4,281,084,900
  5. Step 5: Solve for x
    x = 4,281,084,900/30,447
  6. Step 6: Final answer
    x = 140,607.77

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.