Home / 3,612.10-5,416.80-1,271.20

Finding the Fourth Proportional to 3,612.10, 5,416.80 and 1,271.20

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Solution

The fourth proportional to 3,612.10, 5,416.80 and 1,271.20 is: 1,906.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.10 : 5,416.80 = 1,271.20 : x
  2. Step 2: Convert to fraction form
    3,612.10/5,416.80 = 1,271.20/x
  3. Step 3: Cross multiply
    3,612.10x = 5,416.80 × 1,271.20
  4. Step 4: Simplify right side
    3,612.10x = 6,885,836.16
  5. Step 5: Solve for x
    x = 6,885,836.16/3,612.10
  6. Step 6: Final answer
    x = 1,906.32

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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.