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Finding the Fourth Proportional to 528,688.72, 729,591.10 and 286,971.15

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Solution

The fourth proportional to 528,688.72, 729,591.10 and 286,971.15 is: 396,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,688.72 : 729,591.10 = 286,971.15 : x
  2. Step 2: Convert to fraction form
    528,688.72/729,591.10 = 286,971.15/x
  3. Step 3: Cross multiply
    528,688.72x = 729,591.10 × 286,971.15
  4. Step 4: Simplify right side
    528,688.72x = 209,371,599,015.30
  5. Step 5: Solve for x
    x = 209,371,599,015.30/528,688.72
  6. Step 6: Final answer
    x = 396,020.55

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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.