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Finding the Third Proportional to 421,538 and 632,320

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Solution

The third proportional to 421,538 and 632,320 is: 948,499.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,538 : 632,320 = 632,320 : x
  2. Step 2: Convert to fraction form
    421,538/632,320 = 632,320/x
  3. Step 3: Cross multiply
    421,538x = 632,320 × 632,320
  4. Step 4: Simplify right side
    421,538x = 399,828,582,400
  5. Step 5: Solve for x
    x = 399,828,582,400/421,538
  6. Step 6: Final answer
    x = 948,499.50

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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.