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Finding the Fourth Proportional to 2,318.94, 3,478.62 and 758.88

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Solution

The fourth proportional to 2,318.94, 3,478.62 and 758.88 is: 1,138.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.94 : 3,478.62 = 758.88 : x
  2. Step 2: Convert to fraction form
    2,318.94/3,478.62 = 758.88/x
  3. Step 3: Cross multiply
    2,318.94x = 3,478.62 × 758.88
  4. Step 4: Simplify right side
    2,318.94x = 2,639,855.15
  5. Step 5: Solve for x
    x = 2,639,855.15/2,318.94
  6. Step 6: Final answer
    x = 1,138.39

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1.5x scale

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.