Home / 2,989.55-4,125.71-2,491.35

Finding the Fourth Proportional to 2,989.55, 4,125.71 and 2,491.35

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Solution

The fourth proportional to 2,989.55, 4,125.71 and 2,491.35 is: 3,438.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.55 : 4,125.71 = 2,491.35 : x
  2. Step 2: Convert to fraction form
    2,989.55/4,125.71 = 2,491.35/x
  3. Step 3: Cross multiply
    2,989.55x = 4,125.71 × 2,491.35
  4. Step 4: Simplify right side
    2,989.55x = 10,278,597.92
  5. Step 5: Solve for x
    x = 10,278,597.92/2,989.55
  6. Step 6: Final answer
    x = 3,438.18

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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.