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Finding the Fourth Proportional to 616,979.80, 925,815.30 and 261,933.40

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Solution

The fourth proportional to 616,979.80, 925,815.30 and 261,933.40 is: 393,046.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,979.80 : 925,815.30 = 261,933.40 : x
  2. Step 2: Convert to fraction form
    616,979.80/925,815.30 = 261,933.40/x
  3. Step 3: Cross multiply
    616,979.80x = 925,815.30 × 261,933.40
  4. Step 4: Simplify right side
    616,979.80x = 242,501,949,301.02
  5. Step 5: Solve for x
    x = 242,501,949,301.02/616,979.80
  6. Step 6: Final answer
    x = 393,046.82

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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.