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Finding the Fourth Proportional to 561,640.88, 775,349.88 and 381,306.80

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Solution

The fourth proportional to 561,640.88, 775,349.88 and 381,306.80 is: 526,397.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,640.88 : 775,349.88 = 381,306.80 : x
  2. Step 2: Convert to fraction form
    561,640.88/775,349.88 = 381,306.80/x
  3. Step 3: Cross multiply
    561,640.88x = 775,349.88 × 381,306.80
  4. Step 4: Simplify right side
    561,640.88x = 295,646,181,623.18
  5. Step 5: Solve for x
    x = 295,646,181,623.18/561,640.88
  6. Step 6: Final answer
    x = 526,397.19

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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.