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Finding the Third Proportional to 336,390 and 505,989

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Solution

The third proportional to 336,390 and 505,989 is: 761,095.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,390 : 505,989 = 505,989 : x
  2. Step 2: Convert to fraction form
    336,390/505,989 = 505,989/x
  3. Step 3: Cross multiply
    336,390x = 505,989 × 505,989
  4. Step 4: Simplify right side
    336,390x = 256,024,868,121
  5. Step 5: Solve for x
    x = 256,024,868,121/336,390
  6. Step 6: Final answer
    x = 761,095.36

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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.