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Finding the Fourth Proportional to 408,039.60, 612,059.40 and 347,678.40

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Solution

The fourth proportional to 408,039.60, 612,059.40 and 347,678.40 is: 521,517.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,039.60 : 612,059.40 = 347,678.40 : x
  2. Step 2: Convert to fraction form
    408,039.60/612,059.40 = 347,678.40/x
  3. Step 3: Cross multiply
    408,039.60x = 612,059.40 × 347,678.40
  4. Step 4: Simplify right side
    408,039.60x = 212,799,832,896.96
  5. Step 5: Solve for x
    x = 212,799,832,896.96/408,039.60
  6. Step 6: Final answer
    x = 521,517.60

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1.5x scale

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.