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Finding the Fourth Proportional to 528,855.80, 729,816.82 and 287,133.47

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Solution

The fourth proportional to 528,855.80, 729,816.82 and 287,133.47 is: 396,241.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,855.80 : 729,816.82 = 287,133.47 : x
  2. Step 2: Convert to fraction form
    528,855.80/729,816.82 = 287,133.47/x
  3. Step 3: Cross multiply
    528,855.80x = 729,816.82 × 287,133.47
  4. Step 4: Simplify right side
    528,855.80x = 209,554,837,097.67
  5. Step 5: Solve for x
    x = 209,554,837,097.67/528,855.80
  6. Step 6: Final answer
    x = 396,241.92

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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.