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Finding the Fourth Proportional to 1,318.55, 1,977.68 and 344.73

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Solution

The fourth proportional to 1,318.55, 1,977.68 and 344.73 is: 517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.55 : 1,977.68 = 344.73 : x
  2. Step 2: Convert to fraction form
    1,318.55/1,977.68 = 344.73/x
  3. Step 3: Cross multiply
    1,318.55x = 1,977.68 × 344.73
  4. Step 4: Simplify right side
    1,318.55x = 681,763.90
  5. Step 5: Solve for x
    x = 681,763.90/1,318.55
  6. Step 6: Final answer
    x = 517.05

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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.