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Finding the Fourth Proportional to 637,680.80, 879,934.39 and 392,626.64

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Solution

The fourth proportional to 637,680.80, 879,934.39 and 392,626.64 is: 541,784.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,680.80 : 879,934.39 = 392,626.64 : x
  2. Step 2: Convert to fraction form
    637,680.80/879,934.39 = 392,626.64/x
  3. Step 3: Cross multiply
    637,680.80x = 879,934.39 × 392,626.64
  4. Step 4: Simplify right side
    637,680.80x = 345,485,684,184.42
  5. Step 5: Solve for x
    x = 345,485,684,184.42/637,680.80
  6. Step 6: Final answer
    x = 541,784.67

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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.