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Finding the Fourth Proportional to 528,953.22, 729,952.80 and 287,233.64

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Solution

The fourth proportional to 528,953.22, 729,952.80 and 287,233.64 is: 396,380.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,953.22 : 729,952.80 = 287,233.64 : x
  2. Step 2: Convert to fraction form
    528,953.22/729,952.80 = 287,233.64/x
  3. Step 3: Cross multiply
    528,953.22x = 729,952.80 × 287,233.64
  4. Step 4: Simplify right side
    528,953.22x = 209,666,999,772.19
  5. Step 5: Solve for x
    x = 209,666,999,772.19/528,953.22
  6. Step 6: Final answer
    x = 396,380.99

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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.