Home / 3,609.90-5,416.20-1,420.16

Finding the Fourth Proportional to 3,609.90, 5,416.20 and 1,420.16

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Solution

The fourth proportional to 3,609.90, 5,416.20 and 1,420.16 is: 2,130.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.90 : 5,416.20 = 1,420.16 : x
  2. Step 2: Convert to fraction form
    3,609.90/5,416.20 = 1,420.16/x
  3. Step 3: Cross multiply
    3,609.90x = 5,416.20 × 1,420.16
  4. Step 4: Simplify right side
    3,609.90x = 7,691,843.51
  5. Step 5: Solve for x
    x = 7,691,843.51/3,609.90
  6. Step 6: Final answer
    x = 2,130.76

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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.