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Finding the Fourth Proportional to 208,865.22, 288,383.79 and 128,400.62

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Solution

The fourth proportional to 208,865.22, 288,383.79 and 128,400.62 is: 177,284.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,865.22 : 288,383.79 = 128,400.62 : x
  2. Step 2: Convert to fraction form
    208,865.22/288,383.79 = 128,400.62/x
  3. Step 3: Cross multiply
    208,865.22x = 288,383.79 × 128,400.62
  4. Step 4: Simplify right side
    208,865.22x = 37,028,657,433.95
  5. Step 5: Solve for x
    x = 37,028,657,433.95/208,865.22
  6. Step 6: Final answer
    x = 177,284.94

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1.5x scale

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.