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Finding the Fourth Proportional to 528,776.60, 729,720.51 and 287,059.17

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Solution

The fourth proportional to 528,776.60, 729,720.51 and 287,059.17 is: 396,146.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,776.60 : 729,720.51 = 287,059.17 : x
  2. Step 2: Convert to fraction form
    528,776.60/729,720.51 = 287,059.17/x
  3. Step 3: Cross multiply
    528,776.60x = 729,720.51 × 287,059.17
  4. Step 4: Simplify right side
    528,776.60x = 209,472,961,050.25
  5. Step 5: Solve for x
    x = 209,472,961,050.25/528,776.60
  6. Step 6: Final answer
    x = 396,146.43

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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.