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Finding the Fourth Proportional to 3,318.65, 4,977.98 and 1,369.79

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Solution

The fourth proportional to 3,318.65, 4,977.98 and 1,369.79 is: 2,054.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.65 : 4,977.98 = 1,369.79 : x
  2. Step 2: Convert to fraction form
    3,318.65/4,977.98 = 1,369.79/x
  3. Step 3: Cross multiply
    3,318.65x = 4,977.98 × 1,369.79
  4. Step 4: Simplify right side
    3,318.65x = 6,818,780.38
  5. Step 5: Solve for x
    x = 6,818,780.38/3,318.65
  6. Step 6: Final answer
    x = 2,054.69

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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.