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Finding the Fourth Proportional to 205,390.80, 308,086.20 and 163,918.80

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Solution

The fourth proportional to 205,390.80, 308,086.20 and 163,918.80 is: 245,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,390.80 : 308,086.20 = 163,918.80 : x
  2. Step 2: Convert to fraction form
    205,390.80/308,086.20 = 163,918.80/x
  3. Step 3: Cross multiply
    205,390.80x = 308,086.20 × 163,918.80
  4. Step 4: Simplify right side
    205,390.80x = 50,501,120,200.56
  5. Step 5: Solve for x
    x = 50,501,120,200.56/205,390.80
  6. Step 6: Final answer
    x = 245,878.20

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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.