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Finding the Fourth Proportional to 2,876.85, 3,969.90 and 1,617.93

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Solution

The fourth proportional to 2,876.85, 3,969.90 and 1,617.93 is: 2,232.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.85 : 3,969.90 = 1,617.93 : x
  2. Step 2: Convert to fraction form
    2,876.85/3,969.90 = 1,617.93/x
  3. Step 3: Cross multiply
    2,876.85x = 3,969.90 × 1,617.93
  4. Step 4: Simplify right side
    2,876.85x = 6,423,020.31
  5. Step 5: Solve for x
    x = 6,423,020.31/2,876.85
  6. Step 6: Final answer
    x = 2,232.66

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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.