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Finding the Fourth Proportional to 206,728.40, 310,092.60 and 190,139.60

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Solution

The fourth proportional to 206,728.40, 310,092.60 and 190,139.60 is: 285,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,728.40 : 310,092.60 = 190,139.60 : x
  2. Step 2: Convert to fraction form
    206,728.40/310,092.60 = 190,139.60/x
  3. Step 3: Cross multiply
    206,728.40x = 310,092.60 × 190,139.60
  4. Step 4: Simplify right side
    206,728.40x = 58,960,882,926.96
  5. Step 5: Solve for x
    x = 58,960,882,926.96/206,728.40
  6. Step 6: Final answer
    x = 285,209.40

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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.