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Finding the Fourth Proportional to 713,388.60, 984,454.98 and 391,087.68

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Solution

The fourth proportional to 713,388.60, 984,454.98 and 391,087.68 is: 539,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,388.60 : 984,454.98 = 391,087.68 : x
  2. Step 2: Convert to fraction form
    713,388.60/984,454.98 = 391,087.68/x
  3. Step 3: Cross multiply
    713,388.60x = 984,454.98 × 391,087.68
  4. Step 4: Simplify right side
    713,388.60x = 385,008,214,192.65
  5. Step 5: Solve for x
    x = 385,008,214,192.65/713,388.60
  6. Step 6: Final answer
    x = 539,689.33

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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.