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Finding the Third Proportional to 363,391 and 509,220

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Solution

The third proportional to 363,391 and 509,220 is: 713,570.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,391 : 509,220 = 509,220 : x
  2. Step 2: Convert to fraction form
    363,391/509,220 = 509,220/x
  3. Step 3: Cross multiply
    363,391x = 509,220 × 509,220
  4. Step 4: Simplify right side
    363,391x = 259,305,008,400
  5. Step 5: Solve for x
    x = 259,305,008,400/363,391
  6. Step 6: Final answer
    x = 713,570.25

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.