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Finding the Fourth Proportional to 215,630.20, 323,445.30 and 200,078.20

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Solution

The fourth proportional to 215,630.20, 323,445.30 and 200,078.20 is: 300,117.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,630.20 : 323,445.30 = 200,078.20 : x
  2. Step 2: Convert to fraction form
    215,630.20/323,445.30 = 200,078.20/x
  3. Step 3: Cross multiply
    215,630.20x = 323,445.30 × 200,078.20
  4. Step 4: Simplify right side
    215,630.20x = 64,714,353,422.46
  5. Step 5: Solve for x
    x = 64,714,353,422.46/215,630.20
  6. Step 6: Final answer
    x = 300,117.30

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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.