Home / 3,612.32-5,416.25-1,420.05

Finding the Fourth Proportional to 3,612.32, 5,416.25 and 1,420.05

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Solution

The fourth proportional to 3,612.32, 5,416.25 and 1,420.05 is: 2,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.32 : 5,416.25 = 1,420.05 : x
  2. Step 2: Convert to fraction form
    3,612.32/5,416.25 = 1,420.05/x
  3. Step 3: Cross multiply
    3,612.32x = 5,416.25 × 1,420.05
  4. Step 4: Simplify right side
    3,612.32x = 7,691,338.71
  5. Step 5: Solve for x
    x = 7,691,338.71/3,612.32
  6. Step 6: Final answer
    x = 2,129.20

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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.