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Finding the Third Proportional to 187,440 and 286,728

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Solution

The third proportional to 187,440 and 286,728 is: 438,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,440 : 286,728 = 286,728 : x
  2. Step 2: Convert to fraction form
    187,440/286,728 = 286,728/x
  3. Step 3: Cross multiply
    187,440x = 286,728 × 286,728
  4. Step 4: Simplify right side
    187,440x = 82,212,945,984
  5. Step 5: Solve for x
    x = 82,212,945,984/187,440
  6. Step 6: Final answer
    x = 438,609.40

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.