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Finding the Fourth Proportional to 642,616.40, 963,751.80 and 193,336.40

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Solution

The fourth proportional to 642,616.40, 963,751.80 and 193,336.40 is: 289,952.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,616.40 : 963,751.80 = 193,336.40 : x
  2. Step 2: Convert to fraction form
    642,616.40/963,751.80 = 193,336.40/x
  3. Step 3: Cross multiply
    642,616.40x = 963,751.80 × 193,336.40
  4. Step 4: Simplify right side
    642,616.40x = 186,328,303,505.52
  5. Step 5: Solve for x
    x = 186,328,303,505.52/642,616.40
  6. Step 6: Final answer
    x = 289,952.61

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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.