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Finding the Fourth Proportional to 303.25, 454.88 and 86.83

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Solution

The fourth proportional to 303.25, 454.88 and 86.83 is: 130.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.25 : 454.88 = 86.83 : x
  2. Step 2: Convert to fraction form
    303.25/454.88 = 86.83/x
  3. Step 3: Cross multiply
    303.25x = 454.88 × 86.83
  4. Step 4: Simplify right side
    303.25x = 39,497.23
  5. Step 5: Solve for x
    x = 39,497.23/303.25
  6. Step 6: Final answer
    x = 130.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.