Home / 4,143.28-6,215.12-1,221.88

Finding the Fourth Proportional to 4,143.28, 6,215.12 and 1,221.88

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Solution

The fourth proportional to 4,143.28, 6,215.12 and 1,221.88 is: 1,832.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,143.28 : 6,215.12 = 1,221.88 : x
  2. Step 2: Convert to fraction form
    4,143.28/6,215.12 = 1,221.88/x
  3. Step 3: Cross multiply
    4,143.28x = 6,215.12 × 1,221.88
  4. Step 4: Simplify right side
    4,143.28x = 7,594,130.83
  5. Step 5: Solve for x
    x = 7,594,130.83/4,143.28
  6. Step 6: Final answer
    x = 1,832.88

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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.