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Finding the Third Proportional to 311,040 and 469,409

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Solution

The third proportional to 311,040 and 469,409 is: 708,413.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,040 : 469,409 = 469,409 : x
  2. Step 2: Convert to fraction form
    311,040/469,409 = 469,409/x
  3. Step 3: Cross multiply
    311,040x = 469,409 × 469,409
  4. Step 4: Simplify right side
    311,040x = 220,344,809,281
  5. Step 5: Solve for x
    x = 220,344,809,281/311,040
  6. Step 6: Final answer
    x = 708,413.10

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.