Home / 3,215.78-4,438.28-1,889.81

Finding the Fourth Proportional to 3,215.78, 4,438.28 and 1,889.81

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Solution

The fourth proportional to 3,215.78, 4,438.28 and 1,889.81 is: 2,608.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.78 : 4,438.28 = 1,889.81 : x
  2. Step 2: Convert to fraction form
    3,215.78/4,438.28 = 1,889.81/x
  3. Step 3: Cross multiply
    3,215.78x = 4,438.28 × 1,889.81
  4. Step 4: Simplify right side
    3,215.78x = 8,387,488.46
  5. Step 5: Solve for x
    x = 8,387,488.46/3,215.78
  6. Step 6: Final answer
    x = 2,608.23

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1.5x scale

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.