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Finding the Third Proportional to 30,580 and 64,480

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Solution

The third proportional to 30,580 and 64,480 is: 135,960.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,580 : 64,480 = 64,480 : x
  2. Step 2: Convert to fraction form
    30,580/64,480 = 64,480/x
  3. Step 3: Cross multiply
    30,580x = 64,480 × 64,480
  4. Step 4: Simplify right side
    30,580x = 4,157,670,400
  5. Step 5: Solve for x
    x = 4,157,670,400/30,580
  6. Step 6: Final answer
    x = 135,960.44

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.