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Finding the Fourth Proportional to 647,221.40, 970,832.10 and 363,786.20

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Solution

The fourth proportional to 647,221.40, 970,832.10 and 363,786.20 is: 545,679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,221.40 : 970,832.10 = 363,786.20 : x
  2. Step 2: Convert to fraction form
    647,221.40/970,832.10 = 363,786.20/x
  3. Step 3: Cross multiply
    647,221.40x = 970,832.10 × 363,786.20
  4. Step 4: Simplify right side
    647,221.40x = 353,175,320,497.02
  5. Step 5: Solve for x
    x = 353,175,320,497.02/647,221.40
  6. Step 6: Final answer
    x = 545,679.30

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Double scale
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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.