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Finding the Fourth Proportional to 280,911.56, 387,658.65 and 153,595.37

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Solution

The fourth proportional to 280,911.56, 387,658.65 and 153,595.37 is: 211,961.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,911.56 : 387,658.65 = 153,595.37 : x
  2. Step 2: Convert to fraction form
    280,911.56/387,658.65 = 153,595.37/x
  3. Step 3: Cross multiply
    280,911.56x = 387,658.65 × 153,595.37
  4. Step 4: Simplify right side
    280,911.56x = 59,542,573,780.45
  5. Step 5: Solve for x
    x = 59,542,573,780.45/280,911.56
  6. Step 6: Final answer
    x = 211,961.99

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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.