Home / 3,218.61-4,827.72-1,138.65

Finding the Fourth Proportional to 3,218.61, 4,827.72 and 1,138.65

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Solution

The fourth proportional to 3,218.61, 4,827.72 and 1,138.65 is: 1,707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.61 : 4,827.72 = 1,138.65 : x
  2. Step 2: Convert to fraction form
    3,218.61/4,827.72 = 1,138.65/x
  3. Step 3: Cross multiply
    3,218.61x = 4,827.72 × 1,138.65
  4. Step 4: Simplify right side
    3,218.61x = 5,497,083.38
  5. Step 5: Solve for x
    x = 5,497,083.38/3,218.61
  6. Step 6: Final answer
    x = 1,707.91

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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.