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Finding the Third Proportional to 30,220 and 45,258

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Solution

The third proportional to 30,220 and 45,258 is: 67,779.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,220 : 45,258 = 45,258 : x
  2. Step 2: Convert to fraction form
    30,220/45,258 = 45,258/x
  3. Step 3: Cross multiply
    30,220x = 45,258 × 45,258
  4. Step 4: Simplify right side
    30,220x = 2,048,286,564
  5. Step 5: Solve for x
    x = 2,048,286,564/30,220
  6. Step 6: Final answer
    x = 67,779.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.