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Finding the Fourth Proportional to 641,433.32, 885,117.86 and 383,258.88

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Solution

The fourth proportional to 641,433.32, 885,117.86 and 383,258.88 is: 528,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,433.32 : 885,117.86 = 383,258.88 : x
  2. Step 2: Convert to fraction form
    641,433.32/885,117.86 = 383,258.88/x
  3. Step 3: Cross multiply
    641,433.32x = 885,117.86 × 383,258.88
  4. Step 4: Simplify right side
    641,433.32x = 339,229,279,691.60
  5. Step 5: Solve for x
    x = 339,229,279,691.60/641,433.32
  6. Step 6: Final answer
    x = 528,861.33

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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.