Home / 3,612.85-5,419.23-1,420.05

Finding the Fourth Proportional to 3,612.85, 5,419.23 and 1,420.05

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Solution

The fourth proportional to 3,612.85, 5,419.23 and 1,420.05 is: 2,130.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.85 : 5,419.23 = 1,420.05 : x
  2. Step 2: Convert to fraction form
    3,612.85/5,419.23 = 1,420.05/x
  3. Step 3: Cross multiply
    3,612.85x = 5,419.23 × 1,420.05
  4. Step 4: Simplify right side
    3,612.85x = 7,695,577.56
  5. Step 5: Solve for x
    x = 7,695,577.56/3,612.85
  6. Step 6: Final answer
    x = 2,130.06

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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.