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Finding the Fourth Proportional to 220,800.20, 331,200.30 and 191,640.20

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Solution

The fourth proportional to 220,800.20, 331,200.30 and 191,640.20 is: 287,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,800.20 : 331,200.30 = 191,640.20 : x
  2. Step 2: Convert to fraction form
    220,800.20/331,200.30 = 191,640.20/x
  3. Step 3: Cross multiply
    220,800.20x = 331,200.30 × 191,640.20
  4. Step 4: Simplify right side
    220,800.20x = 63,471,291,732.06
  5. Step 5: Solve for x
    x = 63,471,291,732.06/220,800.20
  6. Step 6: Final answer
    x = 287,460.30

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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.