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Finding the Third Proportional to 638,712 and 888,072

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Solution

The third proportional to 638,712 and 888,072 is: 1,234,784.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,712 : 888,072 = 888,072 : x
  2. Step 2: Convert to fraction form
    638,712/888,072 = 888,072/x
  3. Step 3: Cross multiply
    638,712x = 888,072 × 888,072
  4. Step 4: Simplify right side
    638,712x = 788,671,877,184
  5. Step 5: Solve for x
    x = 788,671,877,184/638,712
  6. Step 6: Final answer
    x = 1,234,784.81

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.