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Finding the Third Proportional to 340,953 and 511,428

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Solution

The third proportional to 340,953 and 511,428 is: 767,139.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,953 : 511,428 = 511,428 : x
  2. Step 2: Convert to fraction form
    340,953/511,428 = 511,428/x
  3. Step 3: Cross multiply
    340,953x = 511,428 × 511,428
  4. Step 4: Simplify right side
    340,953x = 261,558,599,184
  5. Step 5: Solve for x
    x = 261,558,599,184/340,953
  6. Step 6: Final answer
    x = 767,139.75

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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.