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Finding the Fourth Proportional to 486,321.29, 671,005.19 and 285,078.41

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Solution

The fourth proportional to 486,321.29, 671,005.19 and 285,078.41 is: 393,338.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,321.29 : 671,005.19 = 285,078.41 : x
  2. Step 2: Convert to fraction form
    486,321.29/671,005.19 = 285,078.41/x
  3. Step 3: Cross multiply
    486,321.29x = 671,005.19 × 285,078.41
  4. Step 4: Simplify right side
    486,321.29x = 191,289,091,241.56
  5. Step 5: Solve for x
    x = 191,289,091,241.56/486,321.29
  6. Step 6: Final answer
    x = 393,338.92

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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.