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Finding the Fourth Proportional to 308,383.20, 462,574.80 and 142,171.20

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Solution

The fourth proportional to 308,383.20, 462,574.80 and 142,171.20 is: 213,256.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,383.20 : 462,574.80 = 142,171.20 : x
  2. Step 2: Convert to fraction form
    308,383.20/462,574.80 = 142,171.20/x
  3. Step 3: Cross multiply
    308,383.20x = 462,574.80 × 142,171.20
  4. Step 4: Simplify right side
    308,383.20x = 65,764,814,405.76
  5. Step 5: Solve for x
    x = 65,764,814,405.76/308,383.20
  6. Step 6: Final answer
    x = 213,256.80

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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.