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Finding the Fourth Proportional to 528,561.09, 729,414.79 and 286,843.70

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Solution

The fourth proportional to 528,561.09, 729,414.79 and 286,843.70 is: 395,844.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,561.09 : 729,414.79 = 286,843.70 : x
  2. Step 2: Convert to fraction form
    528,561.09/729,414.79 = 286,843.70/x
  3. Step 3: Cross multiply
    528,561.09x = 729,414.79 × 286,843.70
  4. Step 4: Simplify right side
    528,561.09x = 209,228,038,304.75
  5. Step 5: Solve for x
    x = 209,228,038,304.75/528,561.09
  6. Step 6: Final answer
    x = 395,844.57

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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.