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Finding the Fourth Proportional to 528,873.69, 729,860.47 and 287,171.00

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Solution

The fourth proportional to 528,873.69, 729,860.47 and 287,171.00 is: 396,304.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,873.69 : 729,860.47 = 287,171.00 : x
  2. Step 2: Convert to fraction form
    528,873.69/729,860.47 = 287,171.00/x
  3. Step 3: Cross multiply
    528,873.69x = 729,860.47 × 287,171.00
  4. Step 4: Simplify right side
    528,873.69x = 209,594,762,137.09
  5. Step 5: Solve for x
    x = 209,594,762,137.09/528,873.69
  6. Step 6: Final answer
    x = 396,304.01

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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.