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Finding the Fourth Proportional to 308,563.20, 462,844.80 and 86,947.20

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Solution

The fourth proportional to 308,563.20, 462,844.80 and 86,947.20 is: 130,420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,563.20 : 462,844.80 = 86,947.20 : x
  2. Step 2: Convert to fraction form
    308,563.20/462,844.80 = 86,947.20/x
  3. Step 3: Cross multiply
    308,563.20x = 462,844.80 × 86,947.20
  4. Step 4: Simplify right side
    308,563.20x = 40,243,059,394.56
  5. Step 5: Solve for x
    x = 40,243,059,394.56/308,563.20
  6. Step 6: Final answer
    x = 130,420.80

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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.