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Finding the Fourth Proportional to 647,213.40, 970,820.10 and 363,778.20

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Solution

The fourth proportional to 647,213.40, 970,820.10 and 363,778.20 is: 545,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,213.40 : 970,820.10 = 363,778.20 : x
  2. Step 2: Convert to fraction form
    647,213.40/970,820.10 = 363,778.20/x
  3. Step 3: Cross multiply
    647,213.40x = 970,820.10 × 363,778.20
  4. Step 4: Simplify right side
    647,213.40x = 353,163,188,501.82
  5. Step 5: Solve for x
    x = 353,163,188,501.82/647,213.40
  6. Step 6: Final answer
    x = 545,667.30

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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.