Home / 1,613.21-2,226.20-905.06

Finding the Fourth Proportional to 1,613.21, 2,226.20 and 905.06

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Solution

The fourth proportional to 1,613.21, 2,226.20 and 905.06 is: 1,248.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.21 : 2,226.20 = 905.06 : x
  2. Step 2: Convert to fraction form
    1,613.21/2,226.20 = 905.06/x
  3. Step 3: Cross multiply
    1,613.21x = 2,226.20 × 905.06
  4. Step 4: Simplify right side
    1,613.21x = 2,014,845.61
  5. Step 5: Solve for x
    x = 2,014,845.61/1,613.21
  6. Step 6: Final answer
    x = 1,248.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.