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Finding the Fourth Proportional to 308,191.60, 462,287.40 and 261,650.80

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Solution

The fourth proportional to 308,191.60, 462,287.40 and 261,650.80 is: 392,476.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,191.60 : 462,287.40 = 261,650.80 : x
  2. Step 2: Convert to fraction form
    308,191.60/462,287.40 = 261,650.80/x
  3. Step 3: Cross multiply
    308,191.60x = 462,287.40 × 261,650.80
  4. Step 4: Simplify right side
    308,191.60x = 120,957,868,039.92
  5. Step 5: Solve for x
    x = 120,957,868,039.92/308,191.60
  6. Step 6: Final answer
    x = 392,476.20

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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.