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Finding the Third Proportional to 287,928 and 431,946

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Solution

The third proportional to 287,928 and 431,946 is: 648,000.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,928 : 431,946 = 431,946 : x
  2. Step 2: Convert to fraction form
    287,928/431,946 = 431,946/x
  3. Step 3: Cross multiply
    287,928x = 431,946 × 431,946
  4. Step 4: Simplify right side
    287,928x = 186,577,346,916
  5. Step 5: Solve for x
    x = 186,577,346,916/287,928
  6. Step 6: Final answer
    x = 648,000.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.