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Finding the Fourth Proportional to 3,338.79, 5,007.18 and 1,257.30

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Solution

The fourth proportional to 3,338.79, 5,007.18 and 1,257.30 is: 1,885.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,338.79 : 5,007.18 = 1,257.30 : x
  2. Step 2: Convert to fraction form
    3,338.79/5,007.18 = 1,257.30/x
  3. Step 3: Cross multiply
    3,338.79x = 5,007.18 × 1,257.30
  4. Step 4: Simplify right side
    3,338.79x = 6,295,527.41
  5. Step 5: Solve for x
    x = 6,295,527.41/3,338.79
  6. Step 6: Final answer
    x = 1,885.57

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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.