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Finding the Fourth Proportional to 619,289.88, 854,688.30 and 347,384.28

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Solution

The fourth proportional to 619,289.88, 854,688.30 and 347,384.28 is: 479,428.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,289.88 : 854,688.30 = 347,384.28 : x
  2. Step 2: Convert to fraction form
    619,289.88/854,688.30 = 347,384.28/x
  3. Step 3: Cross multiply
    619,289.88x = 854,688.30 × 347,384.28
  4. Step 4: Simplify right side
    619,289.88x = 296,905,279,719.92
  5. Step 5: Solve for x
    x = 296,905,279,719.92/619,289.88
  6. Step 6: Final answer
    x = 479,428.60

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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.