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Finding the Fourth Proportional to 694,778.40, 958,811.40 and 388,852.20

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Solution

The fourth proportional to 694,778.40, 958,811.40 and 388,852.20 is: 536,625.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,778.40 : 958,811.40 = 388,852.20 : x
  2. Step 2: Convert to fraction form
    694,778.40/958,811.40 = 388,852.20/x
  3. Step 3: Cross multiply
    694,778.40x = 958,811.40 × 388,852.20
  4. Step 4: Simplify right side
    694,778.40x = 372,835,922,275.08
  5. Step 5: Solve for x
    x = 372,835,922,275.08/694,778.40
  6. Step 6: Final answer
    x = 536,625.67

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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.