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Finding the Fourth Proportional to 205,478.20, 308,217.30 and 57,734.20

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Solution

The fourth proportional to 205,478.20, 308,217.30 and 57,734.20 is: 86,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,478.20 : 308,217.30 = 57,734.20 : x
  2. Step 2: Convert to fraction form
    205,478.20/308,217.30 = 57,734.20/x
  3. Step 3: Cross multiply
    205,478.20x = 308,217.30 × 57,734.20
  4. Step 4: Simplify right side
    205,478.20x = 17,794,679,241.66
  5. Step 5: Solve for x
    x = 17,794,679,241.66/205,478.20
  6. Step 6: Final answer
    x = 86,601.30

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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.