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Finding the Fourth Proportional to 315,809.69, 473,716.60 and 126,286.04

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Solution

The fourth proportional to 315,809.69, 473,716.60 and 126,286.04 is: 189,429.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,809.69 : 473,716.60 = 126,286.04 : x
  2. Step 2: Convert to fraction form
    315,809.69/473,716.60 = 126,286.04/x
  3. Step 3: Cross multiply
    315,809.69x = 473,716.60 × 126,286.04
  4. Step 4: Simplify right side
    315,809.69x = 59,823,792,410.54
  5. Step 5: Solve for x
    x = 59,823,792,410.54/315,809.69
  6. Step 6: Final answer
    x = 189,429.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.