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Finding the Fourth Proportional to 628,664.69, 867,676.86 and 356,757.92

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Solution

The fourth proportional to 628,664.69, 867,676.86 and 356,757.92 is: 492,393.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,664.69 : 867,676.86 = 356,757.92 : x
  2. Step 2: Convert to fraction form
    628,664.69/867,676.86 = 356,757.92/x
  3. Step 3: Cross multiply
    628,664.69x = 867,676.86 × 356,757.92
  4. Step 4: Simplify right side
    628,664.69x = 309,550,590,721.14
  5. Step 5: Solve for x
    x = 309,550,590,721.14/628,664.69
  6. Step 6: Final answer
    x = 492,393.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.