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Finding the Fourth Proportional to 643,906.64, 888,574.80 and 353,516.76

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Solution

The fourth proportional to 643,906.64, 888,574.80 and 353,516.76 is: 487,844.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,906.64 : 888,574.80 = 353,516.76 : x
  2. Step 2: Convert to fraction form
    643,906.64/888,574.80 = 353,516.76/x
  3. Step 3: Cross multiply
    643,906.64x = 888,574.80 × 353,516.76
  4. Step 4: Simplify right side
    643,906.64x = 314,126,084,313.65
  5. Step 5: Solve for x
    x = 314,126,084,313.65/643,906.64
  6. Step 6: Final answer
    x = 487,844.15

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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.