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Finding the Fourth Proportional to 407,874.60, 611,811.90 and 347,513.40

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Solution

The fourth proportional to 407,874.60, 611,811.90 and 347,513.40 is: 521,270.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,874.60 : 611,811.90 = 347,513.40 : x
  2. Step 2: Convert to fraction form
    407,874.60/611,811.90 = 347,513.40/x
  3. Step 3: Cross multiply
    407,874.60x = 611,811.90 × 347,513.40
  4. Step 4: Simplify right side
    407,874.60x = 212,612,833,529.46
  5. Step 5: Solve for x
    x = 212,612,833,529.46/407,874.60
  6. Step 6: Final answer
    x = 521,270.10

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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.