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Finding the Fourth Proportional to 1,646.62, 2,469.36 and 824.64

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Solution

The fourth proportional to 1,646.62, 2,469.36 and 824.64 is: 1,236.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.62 : 2,469.36 = 824.64 : x
  2. Step 2: Convert to fraction form
    1,646.62/2,469.36 = 824.64/x
  3. Step 3: Cross multiply
    1,646.62x = 2,469.36 × 824.64
  4. Step 4: Simplify right side
    1,646.62x = 2,036,333.03
  5. Step 5: Solve for x
    x = 2,036,333.03/1,646.62
  6. Step 6: Final answer
    x = 1,236.67

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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.