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Finding the Third Proportional to 212,840.25 and 317,415

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Solution

The third proportional to 212,840.25 and 317,415 is: 473,370.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,840.25 : 317,415 = 317,415 : x
  2. Step 2: Convert to fraction form
    212,840.25/317,415 = 317,415/x
  3. Step 3: Cross multiply
    212,840.25x = 317,415 × 317,415
  4. Step 4: Simplify right side
    212,840.25x = 100,752,282,225
  5. Step 5: Solve for x
    x = 100,752,282,225/212,840.25
  6. Step 6: Final answer
    x = 473,370.44

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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.