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Finding the Fourth Proportional to 423,694.20, 635,541.30 and 213,742.20

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Solution

The fourth proportional to 423,694.20, 635,541.30 and 213,742.20 is: 320,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,694.20 : 635,541.30 = 213,742.20 : x
  2. Step 2: Convert to fraction form
    423,694.20/635,541.30 = 213,742.20/x
  3. Step 3: Cross multiply
    423,694.20x = 635,541.30 × 213,742.20
  4. Step 4: Simplify right side
    423,694.20x = 135,841,995,652.86
  5. Step 5: Solve for x
    x = 135,841,995,652.86/423,694.20
  6. Step 6: Final answer
    x = 320,613.30

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Similar ratio
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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.