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Finding the Fourth Proportional to 280,855.29, 387,580.41 and 153,530.85

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Solution

The fourth proportional to 280,855.29, 387,580.41 and 153,530.85 is: 211,872.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,855.29 : 387,580.41 = 153,530.85 : x
  2. Step 2: Convert to fraction form
    280,855.29/387,580.41 = 153,530.85/x
  3. Step 3: Cross multiply
    280,855.29x = 387,580.41 × 153,530.85
  4. Step 4: Simplify right side
    280,855.29x = 59,505,549,790.65
  5. Step 5: Solve for x
    x = 59,505,549,790.65/280,855.29
  6. Step 6: Final answer
    x = 211,872.63

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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.