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Finding the Fourth Proportional to 407,872.60, 611,808.90 and 347,511.40

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Solution

The fourth proportional to 407,872.60, 611,808.90 and 347,511.40 is: 521,267.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,872.60 : 611,808.90 = 347,511.40 : x
  2. Step 2: Convert to fraction form
    407,872.60/611,808.90 = 347,511.40/x
  3. Step 3: Cross multiply
    407,872.60x = 611,808.90 × 347,511.40
  4. Step 4: Simplify right side
    407,872.60x = 212,610,567,371.46
  5. Step 5: Solve for x
    x = 212,610,567,371.46/407,872.60
  6. Step 6: Final answer
    x = 521,267.10

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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.