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Finding the Fourth Proportional to 645,992.11, 891,460.41 and 359,512.12

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Solution

The fourth proportional to 645,992.11, 891,460.41 and 359,512.12 is: 496,121.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,992.11 : 891,460.41 = 359,512.12 : x
  2. Step 2: Convert to fraction form
    645,992.11/891,460.41 = 359,512.12/x
  3. Step 3: Cross multiply
    645,992.11x = 891,460.41 × 359,512.12
  4. Step 4: Simplify right side
    645,992.11x = 320,490,821,895.17
  5. Step 5: Solve for x
    x = 320,490,821,895.17/645,992.11
  6. Step 6: Final answer
    x = 496,121.88

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Double scale
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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.