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Finding the Fourth Proportional to 205,974.70, 308,962.05 and 100,998.70

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Solution

The fourth proportional to 205,974.70, 308,962.05 and 100,998.70 is: 151,498.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,974.70 : 308,962.05 = 100,998.70 : x
  2. Step 2: Convert to fraction form
    205,974.70/308,962.05 = 100,998.70/x
  3. Step 3: Cross multiply
    205,974.70x = 308,962.05 × 100,998.70
  4. Step 4: Simplify right side
    205,974.70x = 31,204,765,399.34
  5. Step 5: Solve for x
    x = 31,204,765,399.34/205,974.70
  6. Step 6: Final answer
    x = 151,498.05

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1.5x scale

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.