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Finding the Fourth Proportional to 636,243.56, 878,032.91 and 345,874.66

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Solution

The fourth proportional to 636,243.56, 878,032.91 and 345,874.66 is: 477,316.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,243.56 : 878,032.91 = 345,874.66 : x
  2. Step 2: Convert to fraction form
    636,243.56/878,032.91 = 345,874.66/x
  3. Step 3: Cross multiply
    636,243.56x = 878,032.91 × 345,874.66
  4. Step 4: Simplify right side
    636,243.56x = 303,689,332,884.67
  5. Step 5: Solve for x
    x = 303,689,332,884.67/636,243.56
  6. Step 6: Final answer
    x = 477,316.16

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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.