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Finding the Fourth Proportional to 660,416.36, 911,384.34 and 373,928.36

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Solution

The fourth proportional to 660,416.36, 911,384.34 and 373,928.36 is: 516,026.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,416.36 : 911,384.34 = 373,928.36 : x
  2. Step 2: Convert to fraction form
    660,416.36/911,384.34 = 373,928.36/x
  3. Step 3: Cross multiply
    660,416.36x = 911,384.34 × 373,928.36
  4. Step 4: Simplify right side
    660,416.36x = 340,792,451,585.88
  5. Step 5: Solve for x
    x = 340,792,451,585.88/660,416.36
  6. Step 6: Final answer
    x = 516,026.66

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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.