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Finding the Fourth Proportional to 619,690.68, 854,978.22 and 347,718.60

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Solution

The fourth proportional to 619,690.68, 854,978.22 and 347,718.60 is: 479,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,690.68 : 854,978.22 = 347,718.60 : x
  2. Step 2: Convert to fraction form
    619,690.68/854,978.22 = 347,718.60/x
  3. Step 3: Cross multiply
    619,690.68x = 854,978.22 × 347,718.60
  4. Step 4: Simplify right side
    619,690.68x = 297,291,829,688.89
  5. Step 5: Solve for x
    x = 297,291,829,688.89/619,690.68
  6. Step 6: Final answer
    x = 479,742.30

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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.