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Finding the Fourth Proportional to 205,810.80, 308,716.20 and 188,703.60

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Solution

The fourth proportional to 205,810.80, 308,716.20 and 188,703.60 is: 283,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,810.80 : 308,716.20 = 188,703.60 : x
  2. Step 2: Convert to fraction form
    205,810.80/308,716.20 = 188,703.60/x
  3. Step 3: Cross multiply
    205,810.80x = 308,716.20 × 188,703.60
  4. Step 4: Simplify right side
    205,810.80x = 58,255,858,318.32
  5. Step 5: Solve for x
    x = 58,255,858,318.32/205,810.80
  6. Step 6: Final answer
    x = 283,055.40

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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.