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Finding the Fourth Proportional to 396,121.79, 546,717.94 and 235,065.64

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Solution

The fourth proportional to 396,121.79, 546,717.94 and 235,065.64 is: 324,432.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,121.79 : 546,717.94 = 235,065.64 : x
  2. Step 2: Convert to fraction form
    396,121.79/546,717.94 = 235,065.64/x
  3. Step 3: Cross multiply
    396,121.79x = 546,717.94 × 235,065.64
  4. Step 4: Simplify right side
    396,121.79x = 128,514,604,030.48
  5. Step 5: Solve for x
    x = 128,514,604,030.48/396,121.79
  6. Step 6: Final answer
    x = 324,432.05

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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.