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Finding the Fourth Proportional to 438,687.12, 605,383.56 and 247,689.12

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Solution

The fourth proportional to 438,687.12, 605,383.56 and 247,689.12 is: 341,808.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,687.12 : 605,383.56 = 247,689.12 : x
  2. Step 2: Convert to fraction form
    438,687.12/605,383.56 = 247,689.12/x
  3. Step 3: Cross multiply
    438,687.12x = 605,383.56 × 247,689.12
  4. Step 4: Simplify right side
    438,687.12x = 149,946,921,238.87
  5. Step 5: Solve for x
    x = 149,946,921,238.87/438,687.12
  6. Step 6: Final answer
    x = 341,808.35

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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.