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Finding the Fourth Proportional to 528,958.95, 729,961.11 and 287,239.56

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Solution

The fourth proportional to 528,958.95, 729,961.11 and 287,239.56 is: 396,389.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,958.95 : 729,961.11 = 287,239.56 : x
  2. Step 2: Convert to fraction form
    528,958.95/729,961.11 = 287,239.56/x
  3. Step 3: Cross multiply
    528,958.95x = 729,961.11 × 287,239.56
  4. Step 4: Simplify right side
    528,958.95x = 209,673,708,053.51
  5. Step 5: Solve for x
    x = 209,673,708,053.51/528,958.95
  6. Step 6: Final answer
    x = 396,389.38

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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.