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Finding the Third Proportional to 144,912 and 311,248

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Solution

The third proportional to 144,912 and 311,248 is: 668,511.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,912 : 311,248 = 311,248 : x
  2. Step 2: Convert to fraction form
    144,912/311,248 = 311,248/x
  3. Step 3: Cross multiply
    144,912x = 311,248 × 311,248
  4. Step 4: Simplify right side
    144,912x = 96,875,317,504
  5. Step 5: Solve for x
    x = 96,875,317,504/144,912
  6. Step 6: Final answer
    x = 668,511.36

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.