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Finding the Fourth Proportional to 646,607.21, 969,910.83 and 197,330.39

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Solution

The fourth proportional to 646,607.21, 969,910.83 and 197,330.39 is: 295,995.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,607.21 : 969,910.83 = 197,330.39 : x
  2. Step 2: Convert to fraction form
    646,607.21/969,910.83 = 197,330.39/x
  3. Step 3: Cross multiply
    646,607.21x = 969,910.83 × 197,330.39
  4. Step 4: Simplify right side
    646,607.21x = 191,392,877,499.57
  5. Step 5: Solve for x
    x = 191,392,877,499.57/646,607.21
  6. Step 6: Final answer
    x = 295,995.58

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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.