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Finding the Fourth Proportional to 438,998.56, 605,805.62 and 257,707.60

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Solution

The fourth proportional to 438,998.56, 605,805.62 and 257,707.60 is: 355,629.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,998.56 : 605,805.62 = 257,707.60 : x
  2. Step 2: Convert to fraction form
    438,998.56/605,805.62 = 257,707.60/x
  3. Step 3: Cross multiply
    438,998.56x = 605,805.62 × 257,707.60
  4. Step 4: Simplify right side
    438,998.56x = 156,120,712,396.71
  5. Step 5: Solve for x
    x = 156,120,712,396.71/438,998.56
  6. Step 6: Final answer
    x = 355,629.21

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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.