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Finding the Fourth Proportional to 617,145.87, 851,318.31 and 358,993.77

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Solution

The fourth proportional to 617,145.87, 851,318.31 and 358,993.77 is: 495,211.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,145.87 : 851,318.31 = 358,993.77 : x
  2. Step 2: Convert to fraction form
    617,145.87/851,318.31 = 358,993.77/x
  3. Step 3: Cross multiply
    617,145.87x = 851,318.31 × 358,993.77
  4. Step 4: Simplify right side
    617,145.87x = 305,617,969,576.93
  5. Step 5: Solve for x
    x = 305,617,969,576.93/617,145.87
  6. Step 6: Final answer
    x = 495,211.88

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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.