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Finding the Fourth Proportional to 619,611.76, 855,064.66 and 347,642.12

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Solution

The fourth proportional to 619,611.76, 855,064.66 and 347,642.12 is: 479,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,611.76 : 855,064.66 = 347,642.12 : x
  2. Step 2: Convert to fraction form
    619,611.76/855,064.66 = 347,642.12/x
  3. Step 3: Cross multiply
    619,611.76x = 855,064.66 × 347,642.12
  4. Step 4: Simplify right side
    619,611.76x = 297,256,491,139.48
  5. Step 5: Solve for x
    x = 297,256,491,139.48/619,611.76
  6. Step 6: Final answer
    x = 479,746.37

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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.