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Finding the Fourth Proportional to 643,745.40, 965,613.30 and 194,465.40

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Solution

The fourth proportional to 643,745.40, 965,613.30 and 194,465.40 is: 291,696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,745.40 : 965,613.30 = 194,465.40 : x
  2. Step 2: Convert to fraction form
    643,745.40/965,613.30 = 194,465.40/x
  3. Step 3: Cross multiply
    643,745.40x = 965,613.30 × 194,465.40
  4. Step 4: Simplify right side
    643,745.40x = 187,778,376,629.82
  5. Step 5: Solve for x
    x = 187,778,376,629.82/643,745.40
  6. Step 6: Final answer
    x = 291,696.65

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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.