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Finding the Fourth Proportional to 303.77, 418.42 and 283.61

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Solution

The fourth proportional to 303.77, 418.42 and 283.61 is: 390.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.77 : 418.42 = 283.61 : x
  2. Step 2: Convert to fraction form
    303.77/418.42 = 283.61/x
  3. Step 3: Cross multiply
    303.77x = 418.42 × 283.61
  4. Step 4: Simplify right side
    303.77x = 118,668.10
  5. Step 5: Solve for x
    x = 118,668.10/303.77
  6. Step 6: Final answer
    x = 390.65

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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.