Home / 2,921.09-4,378.90-1,071.71

Finding the Fourth Proportional to 2,921.09, 4,378.90 and 1,071.71

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Solution

The fourth proportional to 2,921.09, 4,378.90 and 1,071.71 is: 1,606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.09 : 4,378.90 = 1,071.71 : x
  2. Step 2: Convert to fraction form
    2,921.09/4,378.90 = 1,071.71/x
  3. Step 3: Cross multiply
    2,921.09x = 4,378.90 × 1,071.71
  4. Step 4: Simplify right side
    2,921.09x = 4,692,890.95
  5. Step 5: Solve for x
    x = 4,692,890.95/2,921.09
  6. Step 6: Final answer
    x = 1,606.56

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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.