Home / 3,618.40-5,427.64-1,153.20

Finding the Fourth Proportional to 3,618.40, 5,427.64 and 1,153.20

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Solution

The fourth proportional to 3,618.40, 5,427.64 and 1,153.20 is: 1,729.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.40 : 5,427.64 = 1,153.20 : x
  2. Step 2: Convert to fraction form
    3,618.40/5,427.64 = 1,153.20/x
  3. Step 3: Cross multiply
    3,618.40x = 5,427.64 × 1,153.20
  4. Step 4: Simplify right side
    3,618.40x = 6,259,154.45
  5. Step 5: Solve for x
    x = 6,259,154.45/3,618.40
  6. Step 6: Final answer
    x = 1,729.81

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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.