Home / 318,921.20-478,439.40-131,951.60

Finding the Fourth Proportional to 318,921.20, 478,439.40 and 131,951.60

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Solution

The fourth proportional to 318,921.20, 478,439.40 and 131,951.60 is: 197,951.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,921.20 : 478,439.40 = 131,951.60 : x
  2. Step 2: Convert to fraction form
    318,921.20/478,439.40 = 131,951.60/x
  3. Step 3: Cross multiply
    318,921.20x = 478,439.40 × 131,951.60
  4. Step 4: Simplify right side
    318,921.20x = 63,130,844,333.04
  5. Step 5: Solve for x
    x = 63,130,844,333.04/318,921.20
  6. Step 6: Final answer
    x = 197,951.23

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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.