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Finding the Fourth Proportional to 660,540.64, 911,551.44 and 358,736.80

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Solution

The fourth proportional to 660,540.64, 911,551.44 and 358,736.80 is: 495,059.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,540.64 : 911,551.44 = 358,736.80 : x
  2. Step 2: Convert to fraction form
    660,540.64/911,551.44 = 358,736.80/x
  3. Step 3: Cross multiply
    660,540.64x = 911,551.44 × 358,736.80
  4. Step 4: Simplify right side
    660,540.64x = 327,007,046,620.99
  5. Step 5: Solve for x
    x = 327,007,046,620.99/660,540.64
  6. Step 6: Final answer
    x = 495,059.69

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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.