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Finding the Fourth Proportional to 2,196.60, 3,294.90 and 636.60

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Solution

The fourth proportional to 2,196.60, 3,294.90 and 636.60 is: 954.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,196.60 : 3,294.90 = 636.60 : x
  2. Step 2: Convert to fraction form
    2,196.60/3,294.90 = 636.60/x
  3. Step 3: Cross multiply
    2,196.60x = 3,294.90 × 636.60
  4. Step 4: Simplify right side
    2,196.60x = 2,097,533.34
  5. Step 5: Solve for x
    x = 2,097,533.34/2,196.60
  6. Step 6: Final answer
    x = 954.90

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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.