Home / 3,218-4,827.21-1,271.57

Finding the Fourth Proportional to 3,218, 4,827.21 and 1,271.57

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Solution

The fourth proportional to 3,218, 4,827.21 and 1,271.57 is: 1,907.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218 : 4,827.21 = 1,271.57 : x
  2. Step 2: Convert to fraction form
    3,218/4,827.21 = 1,271.57/x
  3. Step 3: Cross multiply
    3,218x = 4,827.21 × 1,271.57
  4. Step 4: Simplify right side
    3,218x = 6,138,135.42
  5. Step 5: Solve for x
    x = 6,138,135.42/3,218
  6. Step 6: Final answer
    x = 1,907.44

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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.