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Finding the Third Proportional to 144,490 and 215,205

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Solution

The third proportional to 144,490 and 215,205 is: 320,528.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,490 : 215,205 = 215,205 : x
  2. Step 2: Convert to fraction form
    144,490/215,205 = 215,205/x
  3. Step 3: Cross multiply
    144,490x = 215,205 × 215,205
  4. Step 4: Simplify right side
    144,490x = 46,313,192,025
  5. Step 5: Solve for x
    x = 46,313,192,025/144,490
  6. Step 6: Final answer
    x = 320,528.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.