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Finding the Fourth Proportional to 716,091.66, 988,231.86 and 393,826.68

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Solution

The fourth proportional to 716,091.66, 988,231.86 and 393,826.68 is: 543,494.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,091.66 : 988,231.86 = 393,826.68 : x
  2. Step 2: Convert to fraction form
    716,091.66/988,231.86 = 393,826.68/x
  3. Step 3: Cross multiply
    716,091.66x = 988,231.86 × 393,826.68
  4. Step 4: Simplify right side
    716,091.66x = 389,192,072,494.03
  5. Step 5: Solve for x
    x = 389,192,072,494.03/716,091.66
  6. Step 6: Final answer
    x = 543,494.77

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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.