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Finding the Fourth Proportional to 642,625.40, 963,765.30 and 193,345.40

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Solution

The fourth proportional to 642,625.40, 963,765.30 and 193,345.40 is: 289,966.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,625.40 : 963,765.30 = 193,345.40 : x
  2. Step 2: Convert to fraction form
    642,625.40/963,765.30 = 193,345.40/x
  3. Step 3: Cross multiply
    642,625.40x = 963,765.30 × 193,345.40
  4. Step 4: Simplify right side
    642,625.40x = 186,339,587,434.62
  5. Step 5: Solve for x
    x = 186,339,587,434.62/642,625.40
  6. Step 6: Final answer
    x = 289,966.11

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1.5x scale

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.