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Finding the Third Proportional to 311,953.50 and 638,655.75

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Solution

The third proportional to 311,953.50 and 638,655.75 is: 1,307,506.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,953.50 : 638,655.75 = 638,655.75 : x
  2. Step 2: Convert to fraction form
    311,953.50/638,655.75 = 638,655.75/x
  3. Step 3: Cross multiply
    311,953.50x = 638,655.75 × 638,655.75
  4. Step 4: Simplify right side
    311,953.50x = 407,881,167,008.06
  5. Step 5: Solve for x
    x = 407,881,167,008.06/311,953.50
  6. Step 6: Final answer
    x = 1,307,506.30

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.