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Finding the Fourth Proportional to 1,078.96, 1,618.38 and 349.06

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Solution

The fourth proportional to 1,078.96, 1,618.38 and 349.06 is: 523.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.96 : 1,618.38 = 349.06 : x
  2. Step 2: Convert to fraction form
    1,078.96/1,618.38 = 349.06/x
  3. Step 3: Cross multiply
    1,078.96x = 1,618.38 × 349.06
  4. Step 4: Simplify right side
    1,078.96x = 564,911.72
  5. Step 5: Solve for x
    x = 564,911.72/1,078.96
  6. Step 6: Final answer
    x = 523.57

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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.