Home / 3,613.64-5,419.32-1,421.76

Finding the Fourth Proportional to 3,613.64, 5,419.32 and 1,421.76

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Solution

The fourth proportional to 3,613.64, 5,419.32 and 1,421.76 is: 2,132.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.64 : 5,419.32 = 1,421.76 : x
  2. Step 2: Convert to fraction form
    3,613.64/5,419.32 = 1,421.76/x
  3. Step 3: Cross multiply
    3,613.64x = 5,419.32 × 1,421.76
  4. Step 4: Simplify right side
    3,613.64x = 7,704,972.40
  5. Step 5: Solve for x
    x = 7,704,972.40/3,613.64
  6. Step 6: Final answer
    x = 2,132.19

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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.