Home / 2,215.20-3,325.20-1,242.12

Finding the Fourth Proportional to 2,215.20, 3,325.20 and 1,242.12

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Solution

The fourth proportional to 2,215.20, 3,325.20 and 1,242.12 is: 1,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.20 : 3,325.20 = 1,242.12 : x
  2. Step 2: Convert to fraction form
    2,215.20/3,325.20 = 1,242.12/x
  3. Step 3: Cross multiply
    2,215.20x = 3,325.20 × 1,242.12
  4. Step 4: Simplify right side
    2,215.20x = 4,130,297.42
  5. Step 5: Solve for x
    x = 4,130,297.42/2,215.20
  6. Step 6: Final answer
    x = 1,864.53

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1.5x scale

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.