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Finding the Fourth Proportional to 423,290.72, 584,167.44 and 279,801.92

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Solution

The fourth proportional to 423,290.72, 584,167.44 and 279,801.92 is: 386,144.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,290.72 : 584,167.44 = 279,801.92 : x
  2. Step 2: Convert to fraction form
    423,290.72/584,167.44 = 279,801.92/x
  3. Step 3: Cross multiply
    423,290.72x = 584,167.44 × 279,801.92
  4. Step 4: Simplify right side
    423,290.72x = 163,451,171,313.49
  5. Step 5: Solve for x
    x = 163,451,171,313.49/423,290.72
  6. Step 6: Final answer
    x = 386,144.00

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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.