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Finding the Fourth Proportional to 283.33, 390.75 and 221.02

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Solution

The fourth proportional to 283.33, 390.75 and 221.02 is: 304.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.33 : 390.75 = 221.02 : x
  2. Step 2: Convert to fraction form
    283.33/390.75 = 221.02/x
  3. Step 3: Cross multiply
    283.33x = 390.75 × 221.02
  4. Step 4: Simplify right side
    283.33x = 86,363.57
  5. Step 5: Solve for x
    x = 86,363.57/283.33
  6. Step 6: Final answer
    x = 304.82

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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.