Home / 2,215.38-3,315.30-1,820.64

Finding the Fourth Proportional to 2,215.38, 3,315.30 and 1,820.64

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Solution

The fourth proportional to 2,215.38, 3,315.30 and 1,820.64 is: 2,724.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.38 : 3,315.30 = 1,820.64 : x
  2. Step 2: Convert to fraction form
    2,215.38/3,315.30 = 1,820.64/x
  3. Step 3: Cross multiply
    2,215.38x = 3,315.30 × 1,820.64
  4. Step 4: Simplify right side
    2,215.38x = 6,035,967.79
  5. Step 5: Solve for x
    x = 6,035,967.79/2,215.38
  6. Step 6: Final answer
    x = 2,724.57

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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.