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Finding the Third Proportional to 214,456 and 315,440

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Solution

The third proportional to 214,456 and 315,440 is: 463,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,456 : 315,440 = 315,440 : x
  2. Step 2: Convert to fraction form
    214,456/315,440 = 315,440/x
  3. Step 3: Cross multiply
    214,456x = 315,440 × 315,440
  4. Step 4: Simplify right side
    214,456x = 99,502,393,600
  5. Step 5: Solve for x
    x = 99,502,393,600/214,456
  6. Step 6: Final answer
    x = 463,975.80

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.