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Finding the Fourth Proportional to 392,359.70, 587,009.90 and 343,943.97

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Solution

The fourth proportional to 392,359.70, 587,009.90 and 343,943.97 is: 514,575.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,359.70 : 587,009.90 = 343,943.97 : x
  2. Step 2: Convert to fraction form
    392,359.70/587,009.90 = 343,943.97/x
  3. Step 3: Cross multiply
    392,359.70x = 587,009.90 × 343,943.97
  4. Step 4: Simplify right side
    392,359.70x = 201,898,513,715.58
  5. Step 5: Solve for x
    x = 201,898,513,715.58/392,359.70
  6. Step 6: Final answer
    x = 514,575.06

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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.