Home / 320,056.20-480,155.79-120,378.30

Finding the Fourth Proportional to 320,056.20, 480,155.79 and 120,378.30

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Solution

The fourth proportional to 320,056.20, 480,155.79 and 120,378.30 is: 180,594.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,056.20 : 480,155.79 = 120,378.30 : x
  2. Step 2: Convert to fraction form
    320,056.20/480,155.79 = 120,378.30/x
  3. Step 3: Cross multiply
    320,056.20x = 480,155.79 × 120,378.30
  4. Step 4: Simplify right side
    320,056.20x = 57,800,337,735.36
  5. Step 5: Solve for x
    x = 57,800,337,735.36/320,056.20
  6. Step 6: Final answer
    x = 180,594.34

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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.