Home / 3,216-4,438.20-1,818.72

Finding the Fourth Proportional to 3,216, 4,438.20 and 1,818.72

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Solution

The fourth proportional to 3,216, 4,438.20 and 1,818.72 is: 2,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216 : 4,438.20 = 1,818.72 : x
  2. Step 2: Convert to fraction form
    3,216/4,438.20 = 1,818.72/x
  3. Step 3: Cross multiply
    3,216x = 4,438.20 × 1,818.72
  4. Step 4: Simplify right side
    3,216x = 8,071,843.10
  5. Step 5: Solve for x
    x = 8,071,843.10/3,216
  6. Step 6: Final answer
    x = 2,509.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.