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Finding the Fourth Proportional to 643,838.40, 965,752.80 and 194,558.40

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Solution

The fourth proportional to 643,838.40, 965,752.80 and 194,558.40 is: 291,836.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,838.40 : 965,752.80 = 194,558.40 : x
  2. Step 2: Convert to fraction form
    643,838.40/965,752.80 = 194,558.40/x
  3. Step 3: Cross multiply
    643,838.40x = 965,752.80 × 194,558.40
  4. Step 4: Simplify right side
    643,838.40x = 187,895,319,563.52
  5. Step 5: Solve for x
    x = 187,895,319,563.52/643,838.40
  6. Step 6: Final answer
    x = 291,836.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.