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Finding the Fourth Proportional to 308,429.40, 462,816.90 and 130,906.20

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Solution

The fourth proportional to 308,429.40, 462,816.90 and 130,906.20 is: 196,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,429.40 : 462,816.90 = 130,906.20 : x
  2. Step 2: Convert to fraction form
    308,429.40/462,816.90 = 130,906.20/x
  3. Step 3: Cross multiply
    308,429.40x = 462,816.90 × 130,906.20
  4. Step 4: Simplify right side
    308,429.40x = 60,585,601,674.78
  5. Step 5: Solve for x
    x = 60,585,601,674.78/308,429.40
  6. Step 6: Final answer
    x = 196,432.64

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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.