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Finding the Fourth Proportional to 643,699.68, 888,214.86 and 385,516.12

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Solution

The fourth proportional to 643,699.68, 888,214.86 and 385,516.12 is: 531,957.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,699.68 : 888,214.86 = 385,516.12 : x
  2. Step 2: Convert to fraction form
    643,699.68/888,214.86 = 385,516.12/x
  3. Step 3: Cross multiply
    643,699.68x = 888,214.86 × 385,516.12
  4. Step 4: Simplify right side
    643,699.68x = 342,421,146,553.54
  5. Step 5: Solve for x
    x = 342,421,146,553.54/643,699.68
  6. Step 6: Final answer
    x = 531,957.93

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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.