Home / 3,613.29-5,415.78-1,661.40

Finding the Fourth Proportional to 3,613.29, 5,415.78 and 1,661.40

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Solution

The fourth proportional to 3,613.29, 5,415.78 and 1,661.40 is: 2,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.29 : 5,415.78 = 1,661.40 : x
  2. Step 2: Convert to fraction form
    3,613.29/5,415.78 = 1,661.40/x
  3. Step 3: Cross multiply
    3,613.29x = 5,415.78 × 1,661.40
  4. Step 4: Simplify right side
    3,613.29x = 8,997,776.89
  5. Step 5: Solve for x
    x = 8,997,776.89/3,613.29
  6. Step 6: Final answer
    x = 2,490.19

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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.