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Finding the Fourth Proportional to 1,654.40, 2,481.90 and 830.60

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Solution

The fourth proportional to 1,654.40, 2,481.90 and 830.60 is: 1,246.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,654.40 : 2,481.90 = 830.60 : x
  2. Step 2: Convert to fraction form
    1,654.40/2,481.90 = 830.60/x
  3. Step 3: Cross multiply
    1,654.40x = 2,481.90 × 830.60
  4. Step 4: Simplify right side
    1,654.40x = 2,061,466.14
  5. Step 5: Solve for x
    x = 2,061,466.14/1,654.40
  6. Step 6: Final answer
    x = 1,246.05

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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.