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Finding the Fourth Proportional to 647,648.20, 971,472.30 and 619,654.60

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Solution

The fourth proportional to 647,648.20, 971,472.30 and 619,654.60 is: 929,481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,648.20 : 971,472.30 = 619,654.60 : x
  2. Step 2: Convert to fraction form
    647,648.20/971,472.30 = 619,654.60/x
  3. Step 3: Cross multiply
    647,648.20x = 971,472.30 × 619,654.60
  4. Step 4: Simplify right side
    647,648.20x = 601,977,279,467.58
  5. Step 5: Solve for x
    x = 601,977,279,467.58/647,648.20
  6. Step 6: Final answer
    x = 929,481.90

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Similar ratio
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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.