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Finding the Fourth Proportional to 528,953.61, 729,958.68 and 287,236.18

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Solution

The fourth proportional to 528,953.61, 729,958.68 and 287,236.18 is: 396,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,953.61 : 729,958.68 = 287,236.18 : x
  2. Step 2: Convert to fraction form
    528,953.61/729,958.68 = 287,236.18/x
  3. Step 3: Cross multiply
    528,953.61x = 729,958.68 × 287,236.18
  4. Step 4: Simplify right side
    528,953.61x = 209,670,542,415.54
  5. Step 5: Solve for x
    x = 209,670,542,415.54/528,953.61
  6. Step 6: Final answer
    x = 396,387.40

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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.