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Finding the Fourth Proportional to 389,147.41, 583,404.13 and 261,195.63

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Solution

The fourth proportional to 389,147.41, 583,404.13 and 261,195.63 is: 391,580.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,147.41 : 583,404.13 = 261,195.63 : x
  2. Step 2: Convert to fraction form
    389,147.41/583,404.13 = 261,195.63/x
  3. Step 3: Cross multiply
    389,147.41x = 583,404.13 × 261,195.63
  4. Step 4: Simplify right side
    389,147.41x = 152,382,609,279.95
  5. Step 5: Solve for x
    x = 152,382,609,279.95/389,147.41
  6. Step 6: Final answer
    x = 391,580.68

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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.