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Finding the Fourth Proportional to 713,638.23, 984,843.56 and 391,347.56

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Solution

The fourth proportional to 713,638.23, 984,843.56 and 391,347.56 is: 540,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,638.23 : 984,843.56 = 391,347.56 : x
  2. Step 2: Convert to fraction form
    713,638.23/984,843.56 = 391,347.56/x
  3. Step 3: Cross multiply
    713,638.23x = 984,843.56 × 391,347.56
  4. Step 4: Simplify right side
    713,638.23x = 385,416,124,858.32
  5. Step 5: Solve for x
    x = 385,416,124,858.32/713,638.23
  6. Step 6: Final answer
    x = 540,072.14

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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.