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Finding the Third Proportional to 145,956 and 315,240

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Solution

The third proportional to 145,956 and 315,240 is: 680,864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,956 : 315,240 = 315,240 : x
  2. Step 2: Convert to fraction form
    145,956/315,240 = 315,240/x
  3. Step 3: Cross multiply
    145,956x = 315,240 × 315,240
  4. Step 4: Simplify right side
    145,956x = 99,376,257,600
  5. Step 5: Solve for x
    x = 99,376,257,600/145,956
  6. Step 6: Final answer
    x = 680,864.49

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.