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Finding the Fourth Proportional to 392,355.56, 587,003.72 and 343,939.83

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Solution

The fourth proportional to 392,355.56, 587,003.72 and 343,939.83 is: 514,568.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,355.56 : 587,003.72 = 343,939.83 : x
  2. Step 2: Convert to fraction form
    392,355.56/587,003.72 = 343,939.83/x
  3. Step 3: Cross multiply
    392,355.56x = 587,003.72 × 343,939.83
  4. Step 4: Simplify right side
    392,355.56x = 201,893,959,666.17
  5. Step 5: Solve for x
    x = 201,893,959,666.17/392,355.56
  6. Step 6: Final answer
    x = 514,568.88

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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.