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Finding the Fourth Proportional to 2,876.78, 3,969.60 and 1,617.69

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Solution

The fourth proportional to 2,876.78, 3,969.60 and 1,617.69 is: 2,232.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.78 : 3,969.60 = 1,617.69 : x
  2. Step 2: Convert to fraction form
    2,876.78/3,969.60 = 1,617.69/x
  3. Step 3: Cross multiply
    2,876.78x = 3,969.60 × 1,617.69
  4. Step 4: Simplify right side
    2,876.78x = 6,421,582.22
  5. Step 5: Solve for x
    x = 6,421,582.22/2,876.78
  6. Step 6: Final answer
    x = 2,232.21

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1.5x scale

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.