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Finding the Fourth Proportional to 638,728.24, 881,404.64 and 366,604.72

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Solution

The fourth proportional to 638,728.24, 881,404.64 and 366,604.72 is: 505,891.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,728.24 : 881,404.64 = 366,604.72 : x
  2. Step 2: Convert to fraction form
    638,728.24/881,404.64 = 366,604.72/x
  3. Step 3: Cross multiply
    638,728.24x = 881,404.64 × 366,604.72
  4. Step 4: Simplify right side
    638,728.24x = 323,127,101,253.90
  5. Step 5: Solve for x
    x = 323,127,101,253.90/638,728.24
  6. Step 6: Final answer
    x = 505,891.37

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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.