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Finding the Fourth Proportional to 215,415.20, 323,122.80 and 170,800.40

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Solution

The fourth proportional to 215,415.20, 323,122.80 and 170,800.40 is: 256,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,415.20 : 323,122.80 = 170,800.40 : x
  2. Step 2: Convert to fraction form
    215,415.20/323,122.80 = 170,800.40/x
  3. Step 3: Cross multiply
    215,415.20x = 323,122.80 × 170,800.40
  4. Step 4: Simplify right side
    215,415.20x = 55,189,503,489.12
  5. Step 5: Solve for x
    x = 55,189,503,489.12/215,415.20
  6. Step 6: Final answer
    x = 256,200.60

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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.