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Finding the Fourth Proportional to 716,166.96, 988,318.64 and 393,882.43

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Solution

The fourth proportional to 716,166.96, 988,318.64 and 393,882.43 is: 543,562.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,166.96 : 988,318.64 = 393,882.43 : x
  2. Step 2: Convert to fraction form
    716,166.96/988,318.64 = 393,882.43/x
  3. Step 3: Cross multiply
    716,166.96x = 988,318.64 × 393,882.43
  4. Step 4: Simplify right side
    716,166.96x = 389,281,347,537.50
  5. Step 5: Solve for x
    x = 389,281,347,537.50/716,166.96
  6. Step 6: Final answer
    x = 543,562.28

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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.