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Finding the Fourth Proportional to 303.33, 418.12 and 258.68

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Solution

The fourth proportional to 303.33, 418.12 and 258.68 is: 356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.33 : 418.12 = 258.68 : x
  2. Step 2: Convert to fraction form
    303.33/418.12 = 258.68/x
  3. Step 3: Cross multiply
    303.33x = 418.12 × 258.68
  4. Step 4: Simplify right side
    303.33x = 108,159.28
  5. Step 5: Solve for x
    x = 108,159.28/303.33
  6. Step 6: Final answer
    x = 356.57

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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.