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Finding the Fourth Proportional to 408,056.60, 612,084.90 and 219,099.80

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Solution

The fourth proportional to 408,056.60, 612,084.90 and 219,099.80 is: 328,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,056.60 : 612,084.90 = 219,099.80 : x
  2. Step 2: Convert to fraction form
    408,056.60/612,084.90 = 219,099.80/x
  3. Step 3: Cross multiply
    408,056.60x = 612,084.90 × 219,099.80
  4. Step 4: Simplify right side
    408,056.60x = 134,107,679,173.02
  5. Step 5: Solve for x
    x = 134,107,679,173.02/408,056.60
  6. Step 6: Final answer
    x = 328,649.70

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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.