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Finding the Third Proportional to 286,218 and 420,575

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Solution

The third proportional to 286,218 and 420,575 is: 618,002.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,218 : 420,575 = 420,575 : x
  2. Step 2: Convert to fraction form
    286,218/420,575 = 420,575/x
  3. Step 3: Cross multiply
    286,218x = 420,575 × 420,575
  4. Step 4: Simplify right side
    286,218x = 176,883,330,625
  5. Step 5: Solve for x
    x = 176,883,330,625/286,218
  6. Step 6: Final answer
    x = 618,002.12

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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.