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Finding the Fourth Proportional to 643,863.36, 888,529.92 and 357,386.88

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Solution

The fourth proportional to 643,863.36, 888,529.92 and 357,386.88 is: 493,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,863.36 : 888,529.92 = 357,386.88 : x
  2. Step 2: Convert to fraction form
    643,863.36/888,529.92 = 357,386.88/x
  3. Step 3: Cross multiply
    643,863.36x = 888,529.92 × 357,386.88
  4. Step 4: Simplify right side
    643,863.36x = 317,548,935,895.45
  5. Step 5: Solve for x
    x = 317,548,935,895.45/643,863.36
  6. Step 6: Final answer
    x = 493,193.05

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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.