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Finding the Third Proportional to 286,720 and 455,505

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Solution

The third proportional to 286,720 and 455,505 is: 723,649.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,720 : 455,505 = 455,505 : x
  2. Step 2: Convert to fraction form
    286,720/455,505 = 455,505/x
  3. Step 3: Cross multiply
    286,720x = 455,505 × 455,505
  4. Step 4: Simplify right side
    286,720x = 207,484,805,025
  5. Step 5: Solve for x
    x = 207,484,805,025/286,720
  6. Step 6: Final answer
    x = 723,649.57

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.