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Finding the Fourth Proportional to 516,815.02, 713,205.30 and 287,369.83

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Solution

The fourth proportional to 516,815.02, 713,205.30 and 287,369.83 is: 396,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,815.02 : 713,205.30 = 287,369.83 : x
  2. Step 2: Convert to fraction form
    516,815.02/713,205.30 = 287,369.83/x
  3. Step 3: Cross multiply
    516,815.02x = 713,205.30 × 287,369.83
  4. Step 4: Simplify right side
    516,815.02x = 204,953,685,816.10
  5. Step 5: Solve for x
    x = 204,953,685,816.10/516,815.02
  6. Step 6: Final answer
    x = 396,570.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.