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Finding the Fourth Proportional to 713,660.70, 984,865.32 and 391,351.62

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Solution

The fourth proportional to 713,660.70, 984,865.32 and 391,351.62 is: 540,072.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,660.70 : 984,865.32 = 391,351.62 : x
  2. Step 2: Convert to fraction form
    713,660.70/984,865.32 = 391,351.62/x
  3. Step 3: Cross multiply
    713,660.70x = 984,865.32 × 391,351.62
  4. Step 4: Simplify right side
    713,660.70x = 385,428,638,463.82
  5. Step 5: Solve for x
    x = 385,428,638,463.82/713,660.70
  6. Step 6: Final answer
    x = 540,072.67

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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.