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Finding the Fourth Proportional to 1,294.99, 1,942.38 and 321.10

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Solution

The fourth proportional to 1,294.99, 1,942.38 and 321.10 is: 481.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.99 : 1,942.38 = 321.10 : x
  2. Step 2: Convert to fraction form
    1,294.99/1,942.38 = 321.10/x
  3. Step 3: Cross multiply
    1,294.99x = 1,942.38 × 321.10
  4. Step 4: Simplify right side
    1,294.99x = 623,693.36
  5. Step 5: Solve for x
    x = 623,693.36/1,294.99
  6. Step 6: Final answer
    x = 481.62

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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.