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Finding the Fourth Proportional to 529,057.13, 730,104.19 and 287,344.42

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Solution

The fourth proportional to 529,057.13, 730,104.19 and 287,344.42 is: 396,538.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,057.13 : 730,104.19 = 287,344.42 : x
  2. Step 2: Convert to fraction form
    529,057.13/730,104.19 = 287,344.42/x
  3. Step 3: Cross multiply
    529,057.13x = 730,104.19 × 287,344.42
  4. Step 4: Simplify right side
    529,057.13x = 209,791,362,471.50
  5. Step 5: Solve for x
    x = 209,791,362,471.50/529,057.13
  6. Step 6: Final answer
    x = 396,538.20

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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.