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Finding the Third Proportional to 287,040 and 628,800

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Solution

The third proportional to 287,040 and 628,800 is: 1,377,471.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,040 : 628,800 = 628,800 : x
  2. Step 2: Convert to fraction form
    287,040/628,800 = 628,800/x
  3. Step 3: Cross multiply
    287,040x = 628,800 × 628,800
  4. Step 4: Simplify right side
    287,040x = 395,389,440,000
  5. Step 5: Solve for x
    x = 395,389,440,000/287,040
  6. Step 6: Final answer
    x = 1,377,471.57

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.