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Finding the Third Proportional to 343,391 and 505,155

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Solution

The third proportional to 343,391 and 505,155 is: 743,122.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,391 : 505,155 = 505,155 : x
  2. Step 2: Convert to fraction form
    343,391/505,155 = 505,155/x
  3. Step 3: Cross multiply
    343,391x = 505,155 × 505,155
  4. Step 4: Simplify right side
    343,391x = 255,181,574,025
  5. Step 5: Solve for x
    x = 255,181,574,025/343,391
  6. Step 6: Final answer
    x = 743,122.49

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.