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Finding the Fourth Proportional to 528,589.20, 729,453.60 and 286,871.82

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Solution

The fourth proportional to 528,589.20, 729,453.60 and 286,871.82 is: 395,883.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,589.20 : 729,453.60 = 286,871.82 : x
  2. Step 2: Convert to fraction form
    528,589.20/729,453.60 = 286,871.82/x
  3. Step 3: Cross multiply
    528,589.20x = 729,453.60 × 286,871.82
  4. Step 4: Simplify right side
    528,589.20x = 209,259,681,837.55
  5. Step 5: Solve for x
    x = 209,259,681,837.55/528,589.20
  6. Step 6: Final answer
    x = 395,883.39

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1.5x scale

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.