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Finding the Fourth Proportional to 3,493.75, 5,240.64 and 1,643.53

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Solution

The fourth proportional to 3,493.75, 5,240.64 and 1,643.53 is: 2,465.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.75 : 5,240.64 = 1,643.53 : x
  2. Step 2: Convert to fraction form
    3,493.75/5,240.64 = 1,643.53/x
  3. Step 3: Cross multiply
    3,493.75x = 5,240.64 × 1,643.53
  4. Step 4: Simplify right side
    3,493.75x = 8,613,149.06
  5. Step 5: Solve for x
    x = 8,613,149.06/3,493.75
  6. Step 6: Final answer
    x = 2,465.30

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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.