Home / 812,086.72-1,120,422.04-472,489.36

Finding the Fourth Proportional to 812,086.72, 1,120,422.04 and 472,489.36

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Solution

The fourth proportional to 812,086.72, 1,120,422.04 and 472,489.36 is: 651,885.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,086.72 : 1,120,422.04 = 472,489.36 : x
  2. Step 2: Convert to fraction form
    812,086.72/1,120,422.04 = 472,489.36/x
  3. Step 3: Cross multiply
    812,086.72x = 1,120,422.04 × 472,489.36
  4. Step 4: Simplify right side
    812,086.72x = 529,387,492,609.49
  5. Step 5: Solve for x
    x = 529,387,492,609.49/812,086.72
  6. Step 6: Final answer
    x = 651,885.42

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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.