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Finding the Fourth Proportional to 3,888.65, 5,364.63 and 2,629.25

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Solution

The fourth proportional to 3,888.65, 5,364.63 and 2,629.25 is: 3,627.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.65 : 5,364.63 = 2,629.25 : x
  2. Step 2: Convert to fraction form
    3,888.65/5,364.63 = 2,629.25/x
  3. Step 3: Cross multiply
    3,888.65x = 5,364.63 × 2,629.25
  4. Step 4: Simplify right side
    3,888.65x = 14,104,969.20
  5. Step 5: Solve for x
    x = 14,104,969.20/3,888.65
  6. Step 6: Final answer
    x = 3,627.21

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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.