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Finding the Third Proportional to 30,458 and 65,440

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Solution

The third proportional to 30,458 and 65,440 is: 140,599.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,458 : 65,440 = 65,440 : x
  2. Step 2: Convert to fraction form
    30,458/65,440 = 65,440/x
  3. Step 3: Cross multiply
    30,458x = 65,440 × 65,440
  4. Step 4: Simplify right side
    30,458x = 4,282,393,600
  5. Step 5: Solve for x
    x = 4,282,393,600/30,458
  6. Step 6: Final answer
    x = 140,599.96

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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.