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Finding the Fourth Proportional to 2,920.41, 4,385.46 and 1,921.41

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Solution

The fourth proportional to 2,920.41, 4,385.46 and 1,921.41 is: 2,885.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.41 : 4,385.46 = 1,921.41 : x
  2. Step 2: Convert to fraction form
    2,920.41/4,385.46 = 1,921.41/x
  3. Step 3: Cross multiply
    2,920.41x = 4,385.46 × 1,921.41
  4. Step 4: Simplify right side
    2,920.41x = 8,426,266.70
  5. Step 5: Solve for x
    x = 8,426,266.70/2,920.41
  6. Step 6: Final answer
    x = 2,885.30

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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.