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Finding the Fourth Proportional to 3,491.88, 4,818.81 and 1,920.03

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Solution

The fourth proportional to 3,491.88, 4,818.81 and 1,920.03 is: 2,649.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.88 : 4,818.81 = 1,920.03 : x
  2. Step 2: Convert to fraction form
    3,491.88/4,818.81 = 1,920.03/x
  3. Step 3: Cross multiply
    3,491.88x = 4,818.81 × 1,920.03
  4. Step 4: Simplify right side
    3,491.88x = 9,252,259.76
  5. Step 5: Solve for x
    x = 9,252,259.76/3,491.88
  6. Step 6: Final answer
    x = 2,649.65

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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.