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Finding the Fourth Proportional to 716,147.34, 988,263.63 and 393,857.34

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Solution

The fourth proportional to 716,147.34, 988,263.63 and 393,857.34 is: 543,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,147.34 : 988,263.63 = 393,857.34 : x
  2. Step 2: Convert to fraction form
    716,147.34/988,263.63 = 393,857.34/x
  3. Step 3: Cross multiply
    716,147.34x = 988,263.63 × 393,857.34
  4. Step 4: Simplify right side
    716,147.34x = 389,234,884,530.54
  5. Step 5: Solve for x
    x = 389,234,884,530.54/716,147.34
  6. Step 6: Final answer
    x = 543,512.30

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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.