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Finding the Fourth Proportional to 392,429.65, 541,387.31 and 246,977.55

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Solution

The fourth proportional to 392,429.65, 541,387.31 and 246,977.55 is: 340,724.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,429.65 : 541,387.31 = 246,977.55 : x
  2. Step 2: Convert to fraction form
    392,429.65/541,387.31 = 246,977.55/x
  3. Step 3: Cross multiply
    392,429.65x = 541,387.31 × 246,977.55
  4. Step 4: Simplify right side
    392,429.65x = 133,710,507,483.07
  5. Step 5: Solve for x
    x = 133,710,507,483.07/392,429.65
  6. Step 6: Final answer
    x = 340,724.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.