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Finding the Fourth Proportional to 713,409.03, 984,504.23 and 391,112.21

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Solution

The fourth proportional to 713,409.03, 984,504.23 and 391,112.21 is: 539,734.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,409.03 : 984,504.23 = 391,112.21 : x
  2. Step 2: Convert to fraction form
    713,409.03/984,504.23 = 391,112.21/x
  3. Step 3: Cross multiply
    713,409.03x = 984,504.23 × 391,112.21
  4. Step 4: Simplify right side
    713,409.03x = 385,051,625,149.65
  5. Step 5: Solve for x
    x = 385,051,625,149.65/713,409.03
  6. Step 6: Final answer
    x = 539,734.72

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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.