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Finding the Fourth Proportional to 3,652.87, 5,479.37 and 1,187.68

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Solution

The fourth proportional to 3,652.87, 5,479.37 and 1,187.68 is: 1,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,652.87 : 5,479.37 = 1,187.68 : x
  2. Step 2: Convert to fraction form
    3,652.87/5,479.37 = 1,187.68/x
  3. Step 3: Cross multiply
    3,652.87x = 5,479.37 × 1,187.68
  4. Step 4: Simplify right side
    3,652.87x = 6,507,741.13
  5. Step 5: Solve for x
    x = 6,507,741.13/3,652.87
  6. Step 6: Final answer
    x = 1,781.54

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1.5x scale

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.