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Finding the Fourth Proportional to 3,163, 4,365.06 and 1,921

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Solution

The fourth proportional to 3,163, 4,365.06 and 1,921 is: 2,651.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163 : 4,365.06 = 1,921 : x
  2. Step 2: Convert to fraction form
    3,163/4,365.06 = 1,921/x
  3. Step 3: Cross multiply
    3,163x = 4,365.06 × 1,921
  4. Step 4: Simplify right side
    3,163x = 8,385,280.26
  5. Step 5: Solve for x
    x = 8,385,280.26/3,163
  6. Step 6: Final answer
    x = 2,651.05

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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.