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Finding the Fourth Proportional to 260,115.20, 389,719.20 and 119,585.60

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Solution

The fourth proportional to 260,115.20, 389,719.20 and 119,585.60 is: 179,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,115.20 : 389,719.20 = 119,585.60 : x
  2. Step 2: Convert to fraction form
    260,115.20/389,719.20 = 119,585.60/x
  3. Step 3: Cross multiply
    260,115.20x = 389,719.20 × 119,585.60
  4. Step 4: Simplify right side
    260,115.20x = 46,604,804,363.52
  5. Step 5: Solve for x
    x = 46,604,804,363.52/260,115.20
  6. Step 6: Final answer
    x = 179,169.86

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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.