Home / 385,052,205.78-531,384,072.36-217,785,193.92

Finding the Fourth Proportional to 385,052,205.78, 531,384,072.36 and 217,785,193.92

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Solution

The fourth proportional to 385,052,205.78, 531,384,072.36 and 217,785,193.92 is: 300,550,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,052,205.78 : 531,384,072.36 = 217,785,193.92 : x
  2. Step 2: Convert to fraction form
    385,052,205.78/531,384,072.36 = 217,785,193.92/x
  3. Step 3: Cross multiply
    385,052,205.78x = 531,384,072.36 × 217,785,193.92
  4. Step 4: Simplify right side
    385,052,205.78x = 115,727,583,244,921,904
  5. Step 5: Solve for x
    x = 115,727,583,244,921,904/385,052,205.78
  6. Step 6: Final answer
    x = 300,550,370.85

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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.