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Finding the Fourth Proportional to 283.32, 391.14 and 221.04

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Solution

The fourth proportional to 283.32, 391.14 and 221.04 is: 305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.32 : 391.14 = 221.04 : x
  2. Step 2: Convert to fraction form
    283.32/391.14 = 221.04/x
  3. Step 3: Cross multiply
    283.32x = 391.14 × 221.04
  4. Step 4: Simplify right side
    283.32x = 86,457.59
  5. Step 5: Solve for x
    x = 86,457.59/283.32
  6. Step 6: Final answer
    x = 305.16

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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.