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Finding the Third Proportional to 393,422 and 577,222

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Solution

The third proportional to 393,422 and 577,222 is: 846,890.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,422 : 577,222 = 577,222 : x
  2. Step 2: Convert to fraction form
    393,422/577,222 = 577,222/x
  3. Step 3: Cross multiply
    393,422x = 577,222 × 577,222
  4. Step 4: Simplify right side
    393,422x = 333,185,237,284
  5. Step 5: Solve for x
    x = 333,185,237,284/393,422
  6. Step 6: Final answer
    x = 846,890.20

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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.