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Finding the Fourth Proportional to 647,558.20, 971,337.30 and 423,609.40

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Solution

The fourth proportional to 647,558.20, 971,337.30 and 423,609.40 is: 635,414.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,558.20 : 971,337.30 = 423,609.40 : x
  2. Step 2: Convert to fraction form
    647,558.20/971,337.30 = 423,609.40/x
  3. Step 3: Cross multiply
    647,558.20x = 971,337.30 × 423,609.40
  4. Step 4: Simplify right side
    647,558.20x = 411,467,610,850.62
  5. Step 5: Solve for x
    x = 411,467,610,850.62/647,558.20
  6. Step 6: Final answer
    x = 635,414.10

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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.