Home / 812,856.78-1,121,742.18-445,346.97

Finding the Fourth Proportional to 812,856.78, 1,121,742.18 and 445,346.97

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Solution

The fourth proportional to 812,856.78, 1,121,742.18 and 445,346.97 is: 614,578.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,856.78 : 1,121,742.18 = 445,346.97 : x
  2. Step 2: Convert to fraction form
    812,856.78/1,121,742.18 = 445,346.97/x
  3. Step 3: Cross multiply
    812,856.78x = 1,121,742.18 × 445,346.97
  4. Step 4: Simplify right side
    812,856.78x = 499,564,480,984.20
  5. Step 5: Solve for x
    x = 499,564,480,984.20/812,856.78
  6. Step 6: Final answer
    x = 614,578.72

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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.