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Finding the Third Proportional to 288,192 and 431,136

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Solution

The third proportional to 288,192 and 431,136 is: 644,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,192 : 431,136 = 431,136 : x
  2. Step 2: Convert to fraction form
    288,192/431,136 = 431,136/x
  3. Step 3: Cross multiply
    288,192x = 431,136 × 431,136
  4. Step 4: Simplify right side
    288,192x = 185,878,250,496
  5. Step 5: Solve for x
    x = 185,878,250,496/288,192
  6. Step 6: Final answer
    x = 644,980.60

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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.