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Finding the Third Proportional to 287,154 and 422,438

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Solution

The third proportional to 287,154 and 422,438 is: 621,457.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,154 : 422,438 = 422,438 : x
  2. Step 2: Convert to fraction form
    287,154/422,438 = 422,438/x
  3. Step 3: Cross multiply
    287,154x = 422,438 × 422,438
  4. Step 4: Simplify right side
    287,154x = 178,453,863,844
  5. Step 5: Solve for x
    x = 178,453,863,844/287,154
  6. Step 6: Final answer
    x = 621,457.00

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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.