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Finding the Fourth Proportional to 528,081, 728,797.86 and 289,663.08

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Solution

The fourth proportional to 528,081, 728,797.86 and 289,663.08 is: 399,760.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081 : 728,797.86 = 289,663.08 : x
  2. Step 2: Convert to fraction form
    528,081/728,797.86 = 289,663.08/x
  3. Step 3: Cross multiply
    528,081x = 728,797.86 × 289,663.08
  4. Step 4: Simplify right side
    528,081x = 211,105,832,825.01
  5. Step 5: Solve for x
    x = 211,105,832,825.01/528,081
  6. Step 6: Final answer
    x = 399,760.33

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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.