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Finding the Fourth Proportional to 638,161.39, 880,668.75 and 351,691.93

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Solution

The fourth proportional to 638,161.39, 880,668.75 and 351,691.93 is: 485,338.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,161.39 : 880,668.75 = 351,691.93 : x
  2. Step 2: Convert to fraction form
    638,161.39/880,668.75 = 351,691.93/x
  3. Step 3: Cross multiply
    638,161.39x = 880,668.75 × 351,691.93
  4. Step 4: Simplify right side
    638,161.39x = 309,724,092,378.19
  5. Step 5: Solve for x
    x = 309,724,092,378.19/638,161.39
  6. Step 6: Final answer
    x = 485,338.19

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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.