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Finding the Fourth Proportional to 392,211.80, 587,128.08 and 354,787.64

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Solution

The fourth proportional to 392,211.80, 587,128.08 and 354,787.64 is: 531,105.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,211.80 : 587,128.08 = 354,787.64 : x
  2. Step 2: Convert to fraction form
    392,211.80/587,128.08 = 354,787.64/x
  3. Step 3: Cross multiply
    392,211.80x = 587,128.08 × 354,787.64
  4. Step 4: Simplify right side
    392,211.80x = 208,305,785,880.93
  5. Step 5: Solve for x
    x = 208,305,785,880.93/392,211.80
  6. Step 6: Final answer
    x = 531,105.35

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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.