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Finding the Fourth Proportional to 415,568.54, 624,238.83 and 391,272.00

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Solution

The fourth proportional to 415,568.54, 624,238.83 and 391,272.00 is: 587,742.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,568.54 : 624,238.83 = 391,272.00 : x
  2. Step 2: Convert to fraction form
    415,568.54/624,238.83 = 391,272.00/x
  3. Step 3: Cross multiply
    415,568.54x = 624,238.83 × 391,272.00
  4. Step 4: Simplify right side
    415,568.54x = 244,247,171,392.39
  5. Step 5: Solve for x
    x = 244,247,171,392.39/415,568.54
  6. Step 6: Final answer
    x = 587,742.22

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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.